RE: What to do to prepare for preschool?
My daughter entered a 2.5 year old preschool class that was having trouble (as a class) because so many of the children were unprepared for being without their parents. The teachers suggested things like making sure your child has some exposure to being left by parents and cared for by others (like your exerciseclass, a church nursery/sunday school, visiting a neighborhood family without you, or having an occasional babysitter.)
I'm also thinking it might help to familiarize your child with someone else changing her diaper or helping her with the potty, although you might have to settle for verbal preparation there.
My DD has had a bit of trouble following rulesm like picking up toys when you're done, so I wish I'd implemented that at home sooner. You could also practice sitting in a circle for storytime by going to library storytimes. If she is shy, you might have her practice simple social phrases, "Want to play?" or "I want a turn" or "It's my turn now" or (to an adult) "I need help."
My DD lovespreschool and it's a pleasure to watch her develop there. Both of you will enjoy it.
BTW, I have alwaysloved your DD's name when I'veseen your posts.
Advice and commentary on living overseas
DD1 15, DD2 12, and DS 9