I'm sure you can do it with practice. If you've been able to do it in your sleep, you definitely have enough to fly. You just need to learn how to tap into it while you're awake.

[In fact, Bulla's confident she'll be able to help with that, even if it would probably be better for her to learn from Gohan, Goten or Trunks if they were here. More knowledgable and yet patient enough to teach.]