Hi and welcome!
I did ChildrensbookPro in Fall 2022. What do you want to know?
They always have live Q&A-Sessions on Youtube beforehand. F.e. tomorrow there will be one, and you can also watch them later on.
I can highly recommend CBPro! When I booked it I thought "Hm, I already know SO much about picture books, I guess they will only add 20% to my 80% knowledge", but man was I wrong! It was more like "I knew 20% and had additional 80% to learn". 
It's self learning, so getting feedback from one of the four tutors is rather rare. They have a weekly zoom meeting with the attendees, in which two of them answer questions and give feedback to work that was posted in the discord channel. You can heighten the chances by submitting homework stuff every week and keep the pace up.
Most participants don't post anything anyways. In my course we were somewhat 80-90 participants, but only up to 15 were active and posting things.
So if you keep up with the schedule until the very end you will be one out of... I guess three.
But it shouldn't be the feedback of the tutors that makes you attend.
The 15 active participants in my course gave feedback to each other, so you yourself should also be willing to give feedback to others.
CBPro is also there to find your own critique group. Sadly in my course I didn't find people with whom the contact lasted longer than 6 months or so.
BUT there is also another discord channel called "CBPro alumni" and all participants of any CBPro course can enter, if they want. I found two friends there, whith whom I met during Bologna Bookfair this year. 
