I'm going to join in with the others in saying don't give up your F/A job until you have the PPL and maybe even an instrument rating. Bid minimal days on schedules, fly your rear end off on days off. You could do the LOA for a few months but with enough seniority you may not need to do that. I don't know if your airline has Continuous-on-duty overnights or not but those are great for lots of time off unless you commute. And if you have a long commute, the LOA makes more sense. Do NOT burn any bridges until you've got plenty of flying hours and are 100% certain you want to do this and have passed a checkride or two.