If you want some guidance from an old fart who has been in this business for a long time then here we go.
Despite what a lot of folks out there don't seem to realise, getting into Ryanair is not all about money (as you have admitted in your first paragraph when you tell us that they have turned you down).
As far as I am aware, Ryanair are the only game in town right now.
So why would you want to spend £30-odd thousand pounds getting a 737 rating to work for exactly who else?
Hard as it might seem, there are hundreds of experienced 737/757/767 rated pilots out there out of work and also looking for jobs. That is a very hard fact that you simply have to get your head around. What can you offer that they can't?
I reckon that you should look for TP work anywhere in the world for the next couple of years until this mess sorts itself out. It was not long ago that I saw adverts for Jetstream crews in Romania.
If you could get that, it would be very illuminating and also very interesting. The ladies are quite beautiful and the cost of living is quite low.
I can well remember being out of work as a DC-10 captain for over a year when Laker went down the tubes. I applied for every job in the world from BN Islander upwards and sent out 316 CVs. I got less than 10 replies and no job offers.
Sorry to be so negative but at least you might find my advice to be practical.