Hi Ricker
Your position is already worse. Your white square bishop is inactive behind the d-pawn. Your knight has poor options. The c-pawn is retarted and will be an future target for white.
I think you should rather spend time to think how to prevent such a desparate position than how to continue it. I don´t know how you played the QGD to get into that desperate position. The fianchetto on b7 seems not a propiate way to me. Try e.g. the Semi-Slav-Defense instead. Just one example - there a very many different lines.
I'm black. I often end up in this kind of position as black playing the queen's gambit declined. I'm curious what I should be striving for and what side I should be long term attempting to attack with my bishops pointing to opposite sides.
For context, I'm only about 1450 level player (my rating at the moment on chess.com is way too high for what I am.)
Thanks for any help!