Others will say this better than me, but don’t focus on the aircraft type yet (ie 777/747). You don’t want to channalize yourself in this career. The steps are the same over the next 5 or 6 years anyway. You’ll learn soon enough that the quality of the job is much more important than the aircraft. Better to fly 737’s or Airbus at a major airline for awhile than to fly 777’s for Norwegian or a Middle East carrier.
Glad to see you’re paying cash, that is a very wise move. You have certainly not missed the hiring wave either. Good Luck!