Well... I'm too old to worry about such things anymore. But there was a time when I used to. I'm an atheist though. So the concept of there being a purpose one might have, if one could just discover it, is foreign to me. From my perspective, we're all just here because... well... you know how we got here... That doesn't mean we shouldn't have a purpose though. But it means we each simply have to decide for ourselves what we want our purpose to be & then go out & make it happen.

I personally don't think that the fact you have mental health concerns should deter you from finding & pursuing a passion. In fact, from my perspective, this is one of the best ways to battle a mental illness! Yes there may be some things you can't do, or choose not to do. (I've always been petrified of public speaking. So I would never do anything that involved speaking to groups.) But then we all have things we're good at & other things we're not.

So your mental health concerns are simply a part of the list of things you perhaps want to avoid. Instead what you want to focus on is the list of things you enjoy & feel you are good at. And once you have some idea of what you feel you're good at along with what you enjoy, & what things you feel you want to or should avoid, then it's just a matter of figuring out what's important to you... what rocks your boat so to speak. At least these are my thoughts with regard to your post.