To be honest, just to get the front up isn't really that hard, and what bike you have won't make much difference. Like some people have already said, higher bars, shorter stays, shorter top tube all make it a bit easier, but you should be able to get the front up on any bike. Just crouch down before you do it, then spring up and back (very smooth motion, don't just yank at the bars), and then lean back more. Keep practising until you can fall off the back every time (As long as you're not going too fast you can just step off and you won't hurt yourself).