Advice for the opening

I'm pushing towards 1000 with Queens gambit. And it has worked for me now that I'm at 906 starting at 840 elo. What has worked for me is understanding the core idea of the opening. What position is advantageous for you and which one is not. The core of the queen's gambit is the center. So ask yourself how and what to do to take it. Bishops are important. I recommend gotham yt take on the opening.