When you begin thinking about your help for mental health in your church, the best place to begin is with the invitation, which will show you what kinds of preparation you need to put in place.
One of the critical pieces of making life work around mental health issues is self-care. How do you minimize the effect that mental health issues are going to have? How do you give yourself the resiliency to bounce back if something happens? How do you maintain the self-care to survive situations that feel more like a gauntlet than a punch in the gut?
God is not put off by your recognition that life is not what you want it to be. He is in it with you, more than you can know. The good news is, he is in the business of redemption, restoration, and re-creation. His good plans will far exceed your wishes. So live in grief for what you have lost, and live in anticipation for what will be. You are blessed.