Personally I think your doing the right thing

Its good to buy a few different brands to see what your baby will like eg their sizing,l if they have narrow hips/waist, long inthe body. You cant reallt tell until bub is aobut 6 weeks (when they have started filling out) what sort of body they will have for nappies so there for Lots of people also start with prefolds for new borns as they are quick drying and to be honest they dont really have them on for longer then 2 hours due to constant weeing and poohing.
You can then use prefolds for extra stuffers for night times or pocket nappies.