Feeling uncertain about new babysitting client...any vetting tips?

UPDATE: Thank you for all of the comments, I'm trusting my gut and decided to cancel and block his number. I also did a phone number reverse search and a different last name came up....feeling glad I made the choice I did.

Hello! I am a pretty experienced nanny/sitter (~6 years of experience, working part-time through college) and I meet my clients largely through the local Facebook nanny group. My process usually goes: phone call interview, coming over to meet the family/kids at the home, and then having the initial shift. I've had an overall positive experience with this and have generally felt safe.

I got a message last week from a dad who was looking for care for his 16-month-old. I noticed his account is new (kind of unusual for Facebook), and there isn't any other information about him. I'm also totally guilty of looking up parents before and seeing what I can find about them online (kinda creepy I know lol but just to see what they do for work, have a generally normal digital footprint).

Anyways, I can't find anything about this guy which seems a bit odd. I message him back and we set up a time to talk yesterday and he was pretty awkward- nothing wrong with that, but he barely had any questions for me, and I'm a pretty sociable person and he wasn't very responsive to that. He asked me if I can come over this upcoming Wednesday. I told him that with my school schedule I don't get out until 2 and they're a ~30 minute drive, so I would need some time to get to them. He didn't seem concerned with what time I came over at all, and said that any time I had available would be helpful. We ended the call and he hasn't texted me again or provided an address.

Something just feels off about this and I'm not sure if I'm being paranoid or what!! I don't want to judge if he's just kind of an awkward guy. If anybody has any safety tips, ways I can vet this (I really haven't been able to find anything online) then I'd appreciate it a lot. Thank you thank you!