Anytime you accept the challenge of more schooling (i.e. more education) you only benefit yourself. Most careers do require post high school education. It takes self discipline and motivation to make changes and part of those changes are not the most fun to go through during the process.
How old are you? How educated are you? Are you married? Children? There are a lot of things to consider when thinking about a move. How would it impact your family? If you are single and no strings... you got a world of more opportunity as far as the hours you work, obligations outside your job, etc.
Knowledge is power.
That said, what are your interests, strengths, weaknesses, etc.
You mention computers, well there are TONS of opportunities with computers so you have to narrow your sights on what part of computers you want to be working with.... selling, repairing, programming, etc.
If I were you I would not let my Real Estate license expire. You can ALWAYS fall back on that for part time work and extra money.
What is it about real estate you do not like? Selling, closing, etc? There are many areas in real estate that are lucrative and you don't have to be on the road selling.
I would speak with someone at the local community college to get ideas on what types of degrees might be most beneficial to you, research the jobs in that field, get an idea of what you would be making at the top... you will start out on the lower end of the scale so don't expect to jump straight to the top.
Also check out temp agencies and let them know you are considering a change and see if you can get a temp job in different types of environments, offices, schools, etc and see what might interest you.
Good luck.