not a must starting with a trainer?
As Hossfly says you can learn on anything given enough time, effort and money, the question is SHOULD you learn on a more sporty plane and will it realy save you money in the long run.
if you decide to go with the more sporty plane as an option buy 2 wings, build 1 as per plans and 1 with a heap of dihedral.
Also dial in some expo on the TX to help with the learner jitters and overcorections.
Good luck, but i'm glad it's your $$ not mine.