Another beginner stuck

Awesome, will do that, thank you!

at the risk of oversimplifying chess, i would say that the game boils down to positions where there is a tactic and positions where there isn't any yet. your puzzle solving should address the first set, and when there is no tactics yet, your fundamentals should help you figure out what to do in the meantime. usually it involves just trying to make every piece participate in the coming battle, and making sure the king is safe. so something like, "i don't see any tactic now, so i will take a look at every piece i have and see which one of them is not doing much and i will improve that piece." something like that.

the reason you want to master basic endings and checkmates is related to tactics somewhat. if you execute a tactic correctly and you win material, the plan is usually to exchange everything else off and head for the endgame where that material will mean more and it will be easier to win, assuming you know basic endings and checkmates.

in puzzle rush whatever mode your goal is to solve the first 20 correctly. if you want to challenge yourself and get past that then better. but the minimum should be get the first 20 correctly and no time goal for now. when you get it right consistently then try to reduce your time. to give you a ballpark, i can solve the first 20 at a rate of about 5 seconds or less per puzzle. it's not considered great here but it's also not that bad. i would say it's middle ground. it's certainly doable with just practice. i am not born to play chess like some genius. i'm just a plebeian.

I'm a beginner myself and one thing that boosted my rating by about 200 points was: after the opponent moves, think why they made that move. What does it attack or defend? Then when it is time to make your move you look for checks, captures, or attacks. If you can check, you see if it is a good check or not. Same thing with captures and attacks. The idea of danger levels also helped me a lot.

As for the game diagram with comentary, you can do it in several ways. All of them includes a miniature chessboard icon just above the place where you type in these posts. It is the first icon on the upper left.

What I concretely did is  that I downloaded pgn file of your game. There is that option when you go to the link of your game. Then I loaded the game in a free outside software I have (pgn chessbook). Then I analyzed the game there and put in comentary. Last thing I did is that I clicked that miniature chessboard I mentioned and pasted the contents of pgn file and therefore you could see it in my message. 

You can do it in different ways. I could click on the game link and then after every move I can right click on the move. You will then see the options to comment before or after the move. After I am done,  I could then again use the miniature chessboard icon. You can even make moves manually  using that miniature chessboard icon and comment on the moves if you don't need the entire game for instance.

Af for your question about taking the pawn with the pawn... well foirst of all, I don't really play Scotch opening, but the essence of that move is this:

You want to eliminate his central pawn. Both you and your opponent are fighting for central control. Allowing his 2 connected central pawns to remain in the center is rarely a good idea and in most cases you will aim to break down a central pawn duo of your opponent. 

In any case, opponent centralizing his queen too early can be a good thing for you as well, especially if you can attack his queen and develop your pieces at the same time.

You can arrive at 3..exd4 by process of elimination even if you don't know anything about the scotch. Defending with f6 weakens the light squares around your king permanently. Defending with d6 is more sensible as it opens bc8, but blocks bf8 unnecessarily, and after all white can add more pressure on e5 by bb5. Counter attacking with nf6 is another try, but even just nc3 and you're back to the same dilemma. Not to mention other ideas for white. So it's not too hard to come up with the conclusion that you need to release the tension as you don't have a particularly favorable way of defending e5. D6 comes close but not enough. Also after ed, nxd4 white is not threatening anything yet, so even here you can make a judgement call that black is fine.

This is my advice:

1) Do puzzles (preferably 10 a day but if that is too much and you begin to not find chess fun any more, feel free to do less)

2) ALWAYS think "What can my opponent do if Id o this?" Think about it as if you were them and you played that move. And remember when you are making your move "checks, captures attacks"

3) Play games longer than 10 minutes, but you can do something like 15|10 instead of 30 as 30 minutes can be quite long

4) I recommend the chess youtuber "GothamChess" I watched him when I was struggling at the 900 level

5) Read some chess books (If you don't want to or do not have the money, that is fine)

6) Analyse your games, if you do not understand why something is the best move, play all the computer best moves and eventually it will be obvious why that was the best move

7) If you are losing 2 or 3 games in a row in day. Stop playing for the day. Analyse your games. Get some sleep and than wake up, do some puzzles and then feel free to start playing some games again.

8) And just try to have some fun, a win is a win and a loss is a loss. Just try not to get to angry at yourself, everyone loses points. I went from 1321 to 1296 today. I was annoyed at first but I calmed down and just did what was best for me.

9) Remember that people will give out advice but it is general advice. Not everything will work for you as a individual. Find out what works best for you and do it.

Hope I helped and good luck with your chess 🙂

I wouldn't focus so much on openings, I would stick to general opening principles, bring your knights, bishops out etc. And then try to make a plan. At your level your opponents are constantly making blunders, so every move just be aware of threats, captures, and attacks on both sides of the board. Also, if recommend watching some of GothamChess and Eric Rosens videos for beginner chess players, it's free content.

Very true, at that level when you study an opening soem people forced to stick to what they know, which can even be a blunder depending on what the opponent does. 

somebody told me checkout chessbrah on youtube. He has these principals that he started a new account with and only plays with them, no tricks, or tactics, but just to focus on the fundamentals, pretty sound advice take it back a step and KISS, keep it simple stupid lol

It is a joke. It has to be a joke, because it is horrible advice. Don't move pawns unless you have a good reason for it. A pawn cannot move back if later turns out that the previous position was better.

"Random pawn move" might be a bit too much, but I do feel like I've had a few positions where all of my pieces are safe, developed and well-positioned and I have no obvious attack or tactics, so rather than making any big changes I've done something benign like a2-a3 and put the decision back to my opponent.

Whether or not that was the right thing for me to do is a different matter...

I think chessbrah is serious, and a pretty good chess player so don’t judge when you are 1200 and he’s 2000 lol