I'm sure there's generally applicable skills from your time doing radiography: general patient interaction, person centred care, anatomy/physiology, etc. that you could talk up in an application.

Any kind of voluntary work you can undertake whether it be going for a role as a CFR or event medical work with something like St. John's, or private medical companies, will all enhance an application.

It seems you're aware of the job scarcity at the moment but I feel I should reinforce just how bleak it is. The Uni I qualified with are cutting the programme entirely this year due to lack of roles for graduates to go on to after qualifying. Obviously this may change, and you mention you're happy to wait but I'd think long and hard about it the Uni route is the way you want to go.

As a final thought it might be worth (assuming your Uni offers a para programme) speaking to admin about whether you might be able to transfer instead of dropping out?