just... lost

I've watched hours of chess brah building habits videos.  I've learned how to develop pieces, I know about trades, I know not to leave anything hanging. But I don't understand when I'm supposed to just pounce.  Its like once everythings fully developed I am just supposed to make subtle moves with my pieces and wait for the opponent to mess up so I can attack.  This type of play doesen't seem correct.  I'm trying to play but it just frustrating and I want to quit because I guess I am supposed to just sit around and consume more hours of media to find the next path.  I have to use every piece of my brain to even beat people similar rank as me, I don't think there are any bad players on here.  I don't know all of its so demoralizing and I understand why people give up.  I will keep trying, feel free to guide me or do I need to hire a coach?

You need to know how to calculate in Chess. You can find videos on YouTube.

A question that I also had difficulty answering previously

Usually, when you play an opening, each of them have a certain idea, and you would like to accomplish it. If you're sure that every piece is active, then try to plan things against your opponent.

But I just realized you're 400, and things aren't really that deep at your level. At that level, you just need to realize if there's any pieces that are hanging by you or by your opponent. And always try to understand what their plan is before making a move. They moved the knight closer to your territory. Why? Check for example if there's a fork. And the most advice of them all: Check where you went wrong, and what you should've done each game. Basically, analyze your games whether it was a win or loss. Let's take your 3 recent losses and how you can learn from them:

Here, your biggest blunder was at move 10: Rd3

Perhaps you were trying to get rid of the pin, but it led to a simple pawn capture. You should think when analyzing: What was I thinking in the position, and what should I've done instead?

In this case, you might've been to focused on the pin, and should've focused on possible captures by your opponent.

Here, you had a problem responding to the fried liver attack. What you should do now? Since it's a popular opening, try to understand how to play against it. You might want to use YouTube videos.

In this case, the problem was 7... Qxf6, or so I would like to say since it's difficult to find instead of it the winning move 7... Bg4. But, in this case, it would've been better if you thought (at move 6. Bg5): Okay, my opponent is trying grab my knight, and I can't move it because of the pin. And your thinking process might've went like this: I'll just grab their bishop and they grab my knight, and it's be pretty much equal. If you thought one move ahead, you will quickly realize that grabbing the knight result on a fork between queen and rook and you wouldn't need to go Qxf6. With that in might, instead of taking the bishop, you might play something like Be7:

You might also want to look how to avoid wayward queen attack opening traps in general (I can see you tried to play the right moves at the beginning, but then didn't know exactly what to do).

Hope this helps! (:

No chess advice, just a general observation. No matter how good you get at chess, you will have to use every piece of your brain to beat people of similar ratings to you, and you will still lose approximately half of those games. That is just the way it is.

I'm not an expert but in my short experience I've realized that you can't wait for the rival instead you must be the active player otherwise a good player will overwhelm you quickly. If the opponent attacks you then you attack him back or create another threat or for example align your pieces to a certain square and later push a pawn to create a rupture