You play the first ten moves okay, in my opinion. The trouble starts in the middlegame. IMPfren and Estragon have it right; you must focus on tactics now, i.e. use the Tactics Trainer or chesstempo.com.
Queen's Gambit and Caro-Kann

Botvinnik played the Caro-Kann six times against Tal in their 1960 world championship match. Tal wrote a book analyzing every game of the match.
I don't think it's true that you don't need ANY opening preparation, but it's not that useful to go deep into memorizing lines since people below expert level probably won't play 15 moves of theory against you. It is a good idea to learn the basic ideas behind the openings you play: key pawn breaks, ideal piece placement, etc.
you have to first get to a point where you do not lose material for no reason, or blunder a checkmate, and then studying openings will have more value. for now just playing for quick development and king safety and being alert to tactics is sufficient. this doesn't mean you shouldn't study openings per se, but put more time on other things like tactics and more general stuff that are useful no matter what.
Most of the advices are good..when more comfortable with basic play and get to openings choose to study largely from modern players and this isn`t to trivialize former great ones but most openings have been advanced,analyzed and modified..an example would be let`s say in the case of Caro Kann, Firoujza would be a better study case now than studying Karpov though 15 -20 years ago Karpov would be more ideal and so on.
Hi gang,
I've just started to study opening lines and am focusing on the Queen's Gambit (or any other response black want's to give to d4.) as White and the Caro-Kann as Black. I'd like to find some Masters that frequently play(ed) these lines so I can study their games. Does anyone know who I should be looking at?
Listen I undersatnd that some of you are going to say I am too new to worry about opening lines. The truth is almost all of the people I play on chess.com don't follow book openings but in my OTB games at Chess Club I find them very useful...and fun!
Here's the lines I've been concentrating on:
White: QGA (e3 and Bg4 versions), QGD (Orthodox, Tarrasch, Albin Countergambit), Dutch Defense and KID.
Black: Caro-Kann (Main line, Panov Botnivvik, Advance, Exchange.)
What I try to do is if someone plays an opening against me I put it on my list. Any suggestions would be most helpful.