C.W.
If you are in Orlando, you would be in Citrus Council, so start here:
http://www.citrus-gs.org/for-volunteers/Pages/default.aspx
Recruitment in our council has always begun *after* school starts, usually late September. If yours is anything like ours, you're likely to have no trouble putting together a troop, because your council may try to place girls who want to join but have no troop openings at their school with yours.
It would be very helpful to line up a co-leader now, so you can both take advantage of training asap.
In addition to what your council offers, please check out your service unit meetings as well. Lots of info and help with upcoming events should be available there.
Have fun! My daughter took a while to warm up to Girl Scouts, but eventually loved it, and earned her Gold Award last year (before she aged out). :-D
ETA
My timeframe was based on school starting around Labor Day (those were the days, lol). Sounds like a lot of areas would get an earlier start now!