Overall, probably fewer than 1 in 100 newly qualified are getting jobs with these airlines and yes they are just about the only ones employing people. To make things worse Ryan and Easyjet have now stopped expanding rapidly so expect employment opportunities to get worse in the future.
There are probably even less opportunities for those prepared to try being instructors. Therefore 9 out 10 should plan for a large debt and no prospect of ever getting a job flying.
Sorry to be so negative but only fools (and there are so many) optimistically ignore the facts when the financial stakes are so high.