@twins4heaven Ballet will give you core strength, body awareness, flexibility, agility, and coordination that will support all the other possibilities. 45 minutes is about right for a very first class, your brain is going to be full. Go for a brisk walk ahead of time, get changed early, and stretch a bit beforehand, then do some sort of cool-down after.
@twins4heaven i think do what draws you in the most. but i REALLY recommend silks if you ever find a decent place. my local place offers classes for less than $20AUD and imo it is so worth it.