Hey Logansrun (Brad), go for it.
It's never too late, and honestly, I think the goals mentioned are attainable, and realistic.
I went back to college in the early 90s. I took nursing, and it's not an easy course, and you have to have a specific type of personality to be really good at it. Some people are good at answering the questions right on the exams/provincial tests: but have the worst practical application of their book knowledge. But if you can get into something like Psychiatry, it is/can be a fascinating branch of nursing/medicine.
The one huge advantage Brad: you have youth on your side. It makes a world of difference. Even if, let's say, you don't like what you take (finish the course), you can always try something else and not ending up long in the tooth like Rayzorblade.
Give it a go, and it'll do wonders for your post-JW life. It'll be therapeutic: I know, been there.
Best of luck, and do it sooner than later.
Best wishes,
Rayzorblade