Beginner - How to learn from game analysis and mistakes?

I recently started playing, after every game I go to analysis and see my mistakes. I often have trouble understanding why a move was a mistake or an inaccuracy and why the best move is the 'best'. I feel like I can't learn from my mistakes when I don't understand why they are mistakes. Does anyone have any advise on how to understand why your errors are errors? 

I want to start logging my mistakes to see if I am repeating the same ones, but I can't do that if I don't understand what I did wrong! Please help!

Well, one of the best things you can do is to take a game and go through it yourself before you look at the computer analysis.

You just started playing. It's going to take a long time to understand all that.

For example, in this game, you decided to go after the knight with your g pawn.  Then you castled.

Looking through to the end, can you see the problems this caused?

This is how I try to analyze my games:

https://www.chess.com/blog/nklristic/how-to-analyze-your-games-first-steps-to-chess-improvement

Perhaps it can be of use to you.

As I've said there, if you don't understand your mistake, move along, try to see why the second best move was better than yours etc.

Some mistakes are apparent - when you hang your queen or a rook, but some are more subtle. Sometimes even very strong players will not understand why is the engine move better than theirs. As you improve your chess, you will understand more and more. 

So, to cut it short, it is ok if you don't understand something, things will get better. 

One of the ways to get better is to analyze your game, and post your analysis on the forum and ask why is the move you don't understand better. The other way is to simply get better and better by studying chess (you have to do this regardless if you want to improve), and figure out more and more after a while.

Oh, and welcome to the site. I hope you will have a great time here.

Thanks for your response and for taking the time to look at my last game. I actually remember in the game thinking if I attack the knight then I should castle queen side. I at least had the thought that my king would be unprotected if I castled that side and did it anyway... oops! I have learnt something from this! Thank you. 

Thanks I am really enjoying myself so far! I actually read your first article before I posted here and am looking forward to watching some of the YouTube series you recommend in that post. I have had a glance through your other article and the technique of annotating my moves and going through the thought process of each move is something I will start doing. Thank you. 

Thank you for taking the time to read it and you're welcome.

It will be a kind of a synergy thing. You will study chess (YouTube is one of the ways), but you will learn something from analyzing your games and playing them as well. And by doing all of that, you will get better and better and you will see more and more in the analysis. One thing will led to another. It will take some time and effort for sure.

 My problem is that I don't even know how to use this feature here, to even find my mistakes and blunders ? I see it listed but that's about it.

See you were on the right track. This is how you should think...after you play g4 and black plays Nf4 what should you do? you KNOW that castling king side would be bad... first of all it drops the h3 pawn but even if it did not, you know that you must castle queen side....  how can u castle queen side? Move the queen away and then castle queen side right? that thought process gives you Qd2 as the move, very simple to find if you think about it like that... Qd2 attacks the knight with tempo and prepares to castle queen side

However here is where tactics come in. To play Qd2 is more of a general principle, you want to castle queen side and u move the queen out of the way.... however you must spot Ng2+ which black can play after Qd2... what will be your response to that? Kf1 to attack the knight? then you can't castle anymore but you will chase the knight to h4 and then you can take that knight 

I have recently analysed an interesting game here.

https://improveinchess.wordpress.com/2020/12/03/exciting-endgames/

Look at how the computer plays it out for a few moves. If you still don't see it ask other people. Some mistakes may simply be too advanced or minor and you can move on and focus on the simpler stuff that is making a larger impact, and once you correct those mistakes you will be ready to deal with the harder ones.