It's a difficult path to walk, but remember, you're not alone. Others have walked this path before & others are walking it now. Many of the questions & doubts you struggle with are things others have already dealt with, many fears are irrational.
Don't be afraid to reach out & ask, it's so much better than to sit & ponder yourself into an early grave, either by worrying about nothing or by stopping yourself due to unfounded fears. I know it's easier said than done & I'm guilty myself, but try.