Well done, one hardly hears of job offers these days!
The very few really happy pilots I know of are either well up the seniority-list at a MAJOR carrier, e.g. KLM, B.A., Cathay, etc., or have worked their way up in general aviation over many years and now fly the bigger bizjets which tend to come with proper rostering, good pay, decent colleagues and a bit of stability.
Starting at the bottom in a low-cost airline is obviously going to be tough, just as cleaning the Citations potty in a blizzard in eastern climes while waiting for the mobile to ring is no picnic. But with Ryanair you will get excellent training, good exposure (lots and lots of approaches) and you will quickly build hours, as previous posters have mentioned. The problem with starting out with low hours straight into a bizjet is that progression takes forever. Plenty of very frustrated bizjet FO's out there who never took the time to build a few hours before jumping into the shiny jet.
Maybe take the 737, get say 3000 hours, then try to get in with the likes of TAG, JET, Execujet or Comlux, to name a few. The better bizjet operators treat their employees well and the lifestyle can be very good.
Who knows, you might even enjoy airline?
Best of luck either way, keep us posted!