my trainer i used to have would loop fairly easy and roll alright. but it was an avistar 40 which is a somewhat aerobatic trainer. i have flown a tower trainer for some people teaching them how to fly and they are hard to do aerobatics with. where with a trainer you have to work to get it to roll but with a kayos for example all you have to do is push the stick to one side. i would say if you can take off, fly around do basic aerobatics like loops, rolls if the airplane will do it, and then land with no sweat then i would say go on with the 2nd airplane. most trainers aren't built to do most aerobatics because they are made to right theirselves. but keep your trainer incase you go a little while without flying and need to touch up on basic flying. once you get more experience going 3-4 weeks at a time without flying wont phase you but learning really you have stay pretty consistant. but yes i would say go on with your next airplane.