>>5750235>the question is about maximizing gainsUnfortunately you'll have to pyw to get more accurate feedback. We don't know what areas you are lacking in.
>am i better strictly grinding boxes like an autist?Just grinding boxes isn't going to help you, you need to make finished work. Every time you make something, look back at it and see what fundies need improving the most, and then focus on them. This way you'll gradually bring all of them to an acceptable level. Since you said you are a /beg/ and assuming all of the fundies need improving, it's good to focus on Gesture, Construction, Perspective, Values first (Since you seem interested in Anatomy, you can study it side-by-side with these but it's not the main focus for you right now and don't get too discouraged if you don't get it yet)
Always keep working on the fundies (especially the ones you are bad at), learn other stuff you are interested in side-by-side, then keep working on those too. Whatever you do, don't wait to "get good" before trying to draw/post anything.