You have not mentioned which type of jobs you are trying for.
If you are talking about "hands-on" (practical) positions, then I can see your dilemma:- "they" need an experienced guy; but how do you gain experience until you get a job.
If I'm on the right track here, I suggest that the solution is more like a question of "doing", rather than "studying"
per se.
So ... what are you like on the tools?

If nothing else you could start fixing some kit ...
any kit will do; just to get some practise in, as it were.
If you really are an "absolute beginner" when it comes to fault finding and so forth ... how about a visit to the auctions at Malmesbury, pick up a car-load of junk, come back and work through them (that is,
fix 'em) - then write it up as an addendum to your CV. You know:- "twenty technical problems on medical equipment, and how I solved them" (or whatever).
Also ... what about charity work? There was a guy on here recently asking for help in dismantling an x-ray system (for instance).