About to loose my ....

I have been trying to hoast a multiplayer race on motorsport 7 all day. The interface for this game on P.C. is complete crap. Can someone please tell me how the hell to set up a race room that I can lock and control for the sake of me and a few friends to practice in? Thanks in advance.

You go into multiplayer and custom multiplayer and you need and invite other player quick or it will just close.