The time to train is around 3 months from start of induction to base training. Line training can be a lottery depending on the time of the year. In winter, it may be disjointed and at different bases to keep you current due to a shortage of trainers with hours available and leave. In the summer however, you are likely to zip through flying 90 hours a month.
You do not get paid until safety pilot release, which is a minimum of 12 sectors I believe. Note minimum. I know of at least 2 cases over Christmas where it took over a month to get safety pilot released.
IndiaNovember - whilst Ryanair will give you a roster on completion of line training they have not given you a job. The guaranteed hours clause (if your contract has one) is not weighted in your favour at all. There have been recent winters where in overcrewed bases FOs have flown 20-30 hours a month all winter. Always be aware where you stand.
And finally, join a union and the RPG.