I also wanted to add that I think that sometimes, you have to make a decision about where you want to/should start. It sounds like for you, treating the episode and getting your mental health under control is the top priority. When you are stable, that would be a good time to really focus on the physical health aspect. It sounds like you are doing a great job trying to prioritize your efforts.

I also wanted to say that being healthy looks different for everyone. As long as your weight is within a healthy range and things like blood pressure and cholesterol are in normal limits, I wouldn't worry too much about weight gain. It's an unfortunate side effect of the medication you are on. And that goes back to your mental health being a priority.