To be honest I would be very wary of any promises to put you through this course, that course etc from either the ATC or ACF.
I could write a very long list of all the courses theoretically available to adults in the Corps. I could then write a much shorter list of those that i have actually been on, or have known people to be on.
Many of these are also run using spare capacity in the Forces and thus can be short notice, weekday courses as well.
I would suggest you try to get a feel for the organisations, and join the one you feel happiest with attending, then worry about what you can get out of it.
It may be unfair, but I would be very wary of a potential instructor rocking up, and wanting to know what they can get out of it straight away.
That said, well done to you for having the initiative to ask, and to seek out the mine of information that is ACC. Whichever Cadet force (or other youth group) you choose, good luck to you, and I am sure you will find it rewarding.