My advice regarding hiring a model - prepare a contract. Even if it's just some photos for socials and dating sites and you may feel like the girl will be professional because you pay her. TBH I don't know the modeling scene in your country, but if it's anything like mine, then there is a lot of girls that will do shit like flaking, ghosting, changing mind about the session details last minute, or even deciding you cannot use their photos anymore (i've really seen a drama like this, the model girl found a new bf and he forced her to withdraw all her previously made photos, shit's crazy..). Have it all on paper, better safe then sorry!
Also, I love the setting (2nd pic) you've prepared - it's gonna be a very cool photo! Well, it already is as it stands, tho it's obviously missing something.