Just finished PS4 trial... Question!

[Niwashi]

How long does it take to get to 50 and start raiding?

It depends on how single-mindedly you focus on that as being a goal. If you restrict yourself to only a single job, race through the quests while skipping their stories, and focus just on leveling up as fast as you can, it's possible to hit 50 within a couple weeks.

On the other hand, if you explore the world, talk to every NPC you can, try out all the different classes, and take your time enjoying the stories, well, that's the way I treat the game and it took just over a year to get my first 50. (Oh, I also divide my attention between multiple characters to some extent, although Y'kayah has sort of become my main. And, although for the first 7 or 8 months the game was out I was playing several hours every day, it eventually trailed off to a more casual schedule. Now I only play maybe a couple times a week on average.)

Really anywhere within that 2 weeks to a year range is pretty reasonable. It all depends on how you play.