How long did you actually study for the Environmental Science exam?

So I've been stressing about my upcoming AP Environmental Science exam and I honestly can't figure out how much time I should be putting in. I started studying about three weeks ago but I feel like I keep circling back to the same topics — energy systems, sustainability, stuff like that — without really making progress. Does anyone have a sense of what score goals are realistic and how many hours per week you were putting in?

I've been using a mix of resources but I found that doing an Environmental Science Environmental Economics and Sustainability practice test helped me figure out where my actual gaps were, which I didn't expect. Like I thought I understood carbon markets but apparently not. My target is a 4, maybe a 5 if I can lock down the free-response section.

Any study guide recommendations or exam tips would be huge right now. I have about six weeks left and I'm trying to figure out if I should go deeper on content or just do more practice tests at this point.