1.) Half of the people attending workshops have attended the same workshop before, from the same artist, at least five times before. Few will actually want to "work" their tree, but simply hand it to the artist and say "here bitch, style me" and the artist will stand there for 3 minutes, and show them why they need to remove 90% of their bushes branches till they leave the thickest 3 or 5. Then there are those who will want to do the work but never take the artists advice and then critique the artist about what a twat they are because they gave you advice you didnt like.
There will be many qualifiedes in the room, but in general, workshops can be a little rough, or at least that has been my experience! You end up with not much time overall with the artist but of course, that's what you paid for, a workshop not a private session (sounds like a massage parlor doesnt it?
). You are on the right page, you are already asking questions and reading up. Just keep doing that! Next month you'll have different questions than you have today, anyway.
2.) (if it is class/workshop) Film it. Workshops are never filmed, and often encouraged to be filmed or hell even avail free to the public. But you go, you watch, and you forget. FILM IT.
Even if it's just a smartphone on a $9 garage sale Tripod, it's worth it! And then your smartphone is down and you are paying attention too!