Errors are part of the road embrace them, learn from them be stronger, dont skip them. To learn how to ride a bike learn to fall first. So you can land on your feet, then try hard and faster, with no more fear to fall.
I dont believe in mentors, not all mentors are qualified to teach, they can misguide you sometimes. If you have a mentor it can turn you into his clone, i had seen tons of great artists that their technique wasnt good but they were more unique and after having mentor, their style lose uniqueness. Because be honest, we copy what we like, and usually we ask for mentors of people that style will enjoy the most.
For example you