My guess is that as well as you write, you're more than capable of tackling this without a coach.

Good for you for coming back and working to improve yourself now that the children are taking less of your time.

If you are talking Math I could probably help , other subjects a bit more iffy . We are all learning here . There is no shame in not
having had ample opportunity to finish something . Khan Academy
is set out very well , but if you still need a coach , I'm your guy.
Just reply to this answer. I presently don't know how to "coach"
within Khan Academy , but I'll find out.....

Have you considered taking the GED? That'll cover the bulk of what you ought to know. But I would also like to give some personal advice: don't feel insecure because you lack formal education. Education isn't a diploma or some letters after your name. It is a tool to help you navigate life and your world. If you have intellectual curiosity, learn because you enjoy it. Or if you need degrees to get a better job, get the education to improve your lot in life. Don't feel that you need to learn just for the sake of learning because everyone seems to have a college degree. It is just a tool, not really an end in itself. Good luck.

I will help you!!!