1st Phone Call w/ College Coach - Any advice/insight?

Hi,
My older boy - 2024 - has a 1st phone call scheduled w/ an Ivy. Any suggestions, pointers or general info on what gets discussed on a 1st phone call, things he should be asking about, questions to anticipate from the coach and reasonable next steps after the call to expect, assuming the call goes well?

Any insights into how far he's made it into the process would also be appreciated i.e. is he one of 200 calls they're making, one of 100 calls, one of 50, one of 20 or one of ten calls or...

1st Phone Call w/ College Coach - Any advice/insight?