I think you are blind by your guilty and past actions.

You are not your past.

Now see it:

"My only success, if you can call that, is having her get a job as a programmer, a better and stable one, after having taught her programming for a few months and preparing her for the interview."

You are a natural born teacher/mentor.

This is your super power. Not doing "Functional Programming" or learning the new javascript framework launched yesterday.

Mentor/teacher/guide is your super power.

Now you must open yourself to your target and people.

Do they need volunteers to coach? Do people need your help to navigate society? Do people need your mentoring to help with things that are simple to you but hard to others? Dating, communicating, planning, etc.

Teacher/Mentoring think, be open. Volunteer then charge.