And if you are, then it can at least give you an idea on stuff you might be interested in
Edit: you might also be eligible for help from some of the service charities. I approached SSAFA who managed to get me a pretty hefty sum to help me pay the tuition fees for a masters degree & living expenses for that year.
Lots of free online courses. Register for free and you do the course(s) you want to do in your own time, with each module revised and you are tested.
Look at the Digital Literacy and IT Courses - well worth a visit.
There also some good H and S Courses and Brain Training.