Ryanair I think was always gonna be a stepping stone to greater things.
Bear in mind that if you are successful and land a job with FR that there are at least a couple of thousand pilots ahead of you who may well have the same idea. There are not and will never be enough jobs around for them all to jump ship.
You would be better doing your financial planning on the basis that you are stuck at FR for your career. Have a good read through the T&E forums where you will get a flavour for the average hours flown pa and how this might drop once your fully right seat qualified.