Not trying to rain on your parade and not saying it's impossible, but it is very very very unlikely any owner is going to let anyone go it alone with their dog. Especially people new to this with no experience. There are just too many ways for things to go sideways.
Owners in general are super selective on who they meet when the goal is with the owner being there, things get infinitely more difficult if the bar is the owner not being there.
Again, I'm not saying that's impossible, but I am saying that is a very very unrealistic expectation and if it ever happens, it will be a very long time coming.