If you want weekly updates just ask the trainer for weekly updates. I’m sure they’ll be more than happy to oblige. Let them know what your expectations are.
It’s not easy leaving your first dog at a trainer that’s for sure. My boy has been gone for several months already and has just over one more month to go. What’s made it easy is that he’s only about 20 minutes away and the trainer has offered me to come any day of the week if need be but I haven’t felt the need to since he offers weekend training sessions where I can come up and do the training with my dog. It’s a great ‘Train the Trainer’ (me) experience so I’m familiar with all the commands and ability of the dog. I’ve even taken the dog back for a couple days at a time twice this year.