Everyone who does bikes uses a footpedal to control the current.
I agree with all that fish says.
A lot of the corrections you have to make while tig welding happen quicker than it takes for yo uto consciously think about it. It needs to happen like second nature. The only way for that to happen is to spend a lot of hours behind the torch. Luckily tig is fun. :)
The only real way to get a feel for it is to continue to do it. only THEN should you get lessons. Get a stack of metal and build up something crap.
Here are some crap things i made: