You can do all the basic aerobatics with any trainer. Once you feel proficient and move up to a more capable airplane you'll really be ready to enjoy it. I flew my LT-40 a couple hundred flights before I got my Four Star 60 going (with a Saito 100) and was really able to enjoy the added performance because of all my time on the LT-40.

I was also flying a Zagi 400X at the same time with the LT-40.

Anyway, fly the heck out of your trainer and take your time picking and assembling the next airplane.