I'm glad you're enjoying yourself, keep up the good attitude!
I'd guess you might get sore thighs from bokken work if you were doing repetitve cuts in horse-stance...
As for the chance to perfect the technique, just keep coming back, you'll see them again, and again, and again. In fact, make a copy of this and in three months, when you are tempted to think 'oh, no, not ikkyo again
' pull this out and re-read it