Blueboy ,
Sorry to tell you this but a 747 is not suitable equipment for your first jet .
Simply the likely sector times would mean that you get little consolidation . It its best to fly a shorthaul jet first for at least two years .
No doubt some will say I've done it you'll be fine but you won't be really .
This may not be what you want to hear but it is sensible logical advice in answer to your Q from a 747 TRE