So I'm an artistic gymnast looking into t&t.
How do levels work?
1-10 then elite, just like artistic (if we're talking USAG. I could do a whole post on USTA, but I have a lot in the T&T forums already).
On trampoline, L1-7 are compulsory, then 8+ have a complusory routine & an optional routine.
On double mini, L1-7 are compulsory (pick 2 of 3 options), & 8+ are optional levels.
On tumbling, 1-6 are compulsory, 7, 9, 10, elite have a compulsory pass & an optional pass, 8 has 2 optional passes
It is not required to be the same level on all events.
Varies. A lot. Our 4-6s go 4h, higher level kids go 5-9h/week.
How can I find a gym in my area?
USAG or USTA website, among other online tools. Or the phone book, under "gymnastic instruction"
Could I do both artistic and t&t gymnastics?
Yes, but it does get hard to maintain that sort of pace.
We have a T&T forum. I put up some youtube videos of the different levels there a while ago.