It should be as easy as here on HN:
Hello! I think Hamburg in Germany needs a good solopreneur meetup. If anyone is interested, let me know!
This is what I would have posted, but I got stuck somewhere along the long signup process.
The sign-up form only asks for name, email, password and a pre-filled location - there's some quick "Interests" selection after that, but I felt it was fairly easy/quick to fill out. Maybe I could move that out of the sign-up.
Which part specifically felt too complicated? I'll revisit it and see if there's anything else I can shave off or make it smoother!