I agree with Elizabeth, too.
There is a list of questions in the AVM 101 category which might be of use but you can also search for “questions to ask” or similar and see others lists of questions.
Don’t rush in: make sure you get more than one opinion, especially where there are significant surgical risks. At the end of the day, we are not the experts so we need to look to the doctors to give sound, honest, balanced advice. If it feels sound, honest, balanced then great. If it sounds less balanced or too easy or anything else too extreme, I would go find another opinion.
I have to say I have accepted the feedback I’ve had from my interventional radiologist as he was so deliberate, so measured in his approach I bought the whole story in one go. If I have to trust my life to someone, he gave the right degree of confidence that he was the right person for the job.
Just take it one step at a time.
Very best wishes,
Richard