Well as tIANci said, the Extra is a whole different animal...

I've watched several people at our club do something similar. One guy in particular who went directly from his trainer to them, crashed three Extras in a row (I saw him crash two) by tip stalling them before he picked up one of the "Stik" type models. I'm not sure which one, a Big Stick maybe? Any way, he started with it in the tricycle gear configuration, then converted it to the taildragger and he's doing really well with it now. I see a number of these type models around and most seem to fly quite well, can be slowed down without stalling quite nicely, and will do all the aerobatics.

I personally went from a trainer to a Funtana 90 setup with a forward CG and some initial help from my buddy/instructor on the buddy box. With that forward CG, the real light wing loading, and some help getting started flying it, that model worked out well for me and I went from there to a 50cc gasser powered Extra. To say that the Extra was "touchy" when compared to the Funtana, would be an understatement. Nor is it as forgiving of mistakes regarding airspeed or being ham handed with the tx sticks.

Don't get me wrong, I really liked the Extra once I got used to it and have now moved on to an even bigger Edge, but you're making a pretty good leap here and it may turn out to be a short lived experience for you. If you're willing to accept that possible outcome, or as tIANci said it may be okay, then go for it...