Practice, practice, pra....errrr sorry.
Do you ride alone? I do and I find that slows my progression as riding with someone of similar talent or better than you always helps. I would recommend a mod, I bought one for a laugh on here and found I could do more stuff on it, not big but it helped teach me the techniques I needed being lighter, steadier on the back wheel and flickier in general.
If you can I'd just look for a cheap onza on ebay until you're validated, how much have you got to spend?