Practice with one at a time, of course. Your planes will only get better with time. The more you practice, the better you will get. Just keep working at it, and eventually, you'll get it. It can be pretty frustrating, but that's why I personally try to learn multiple moves at once. When I get too frustrated with flowers, for example, I'll begin practicing weaves. Once I get sick of that, I go back to flowers. I'm far more advanced than that by now, but it's just a simple example.
I hope my advice is helpful, it sounds like common sense, to me, more than anything. lol
Well, good luck, keep practicing, and most importantly, have fun!