What is your end goal? Airline pilot? Flight instructor? Bizjet pilot? Plane spotter? Figure that out first.
If you don't get the Ryanair 737NG type and experience, someone else will get it and move forward. At the end of the day, if you have the type and you get a minimum acceptable number of hours in it (not sure - probably 2,000 hours of 737NG flying), you become attractive to other carriers worldwide. Sure, that could take many years, but they may be the requirement to move to another gig down the road.
I haven't checked into them, but have you also looked at some of these flight programs (not sure if attached to a specific flight school) that set you up with low-pay Indonesian operators like Lion Air? Sounds like they pay nothing, they treat you like craaap, procedures are questionable, but you can get something like 800 hours per year on a 737-900ER. If you can withstand the short term pain, the long-term gain in terms of experience and career marketability could be very good. Just sayiang I would look into it if Ryanair would not get you where you want to go....