How to start a practice session?
I find the practice sessions (the ones you have to so every 18 hours) pretty useful. Do you know how to do them without having to wait another 18 hours?
Hmm... I think the practice sessions are there as a way to poke you in the ribs and say, "You should study a few minutes at least once every 18 hours". If you feel like studying sooner, why don't you just do a regular lesson? I find the practice sessions and the lessons are pretty much the same thing.