Check with your employer if they will help with your continued education somehow. My employer, for example, will reimburse some tuition costs if you get a degree while working there.
As a nurse you can continue up to and including a PhD. Or you can go to medical school and become an MD. There are many options. Try to find a few that sound interesting and learn more about them.
If you feel you have unused potential, maybe making a change in your career is just what you need. Even if you just look into what it would take, it could put things in perspective for you.
As someone with a slight accent: good. I want you to hear what I'm saying, not my accent.
Regardless, active listening is the way to go. Learn what to listen for and maybe try to actively place the accent once you recognize the markers.
Just please listen to the words first.