If there's one thing I've learn over the last few years is that it's incredibly difficult working on a project when you don't have peace of mind. It can be difficult working on something or staying motivated when you're battling depression, or if you're sad, don't have friends, or if anything is troubling your mind.

I've been there and I know what it feels like. I would try to perhaps solve the mental health problem first perhaps before tackling big projects. Maybe try gym, hiking, somehow finding friends, talk to more people, solve your sleep, eat better - something. Because again, if you don't have peace of mind, working on a project is difficult (at least for me it is).

Hope that helps.