Identify who your buyer is. It’s probably not a technical person (and thus HN isn’t a great place to advertise).

Talk to operational people if you are interested in finding operational pain. Tech teams will tell you they are working on it and don’t need help, or at best want to hire an IC. (If that’s what you want then just approach it as a job search)

For the same reason, hours are a bad unit of time and a bad giveaway. You want to be able to offer a free diagnostic or something - nobody’s waiting with operational pain and a plan to fix it that they want to start paying for. You need to help with the plan and show them what they need.

Just my $0.02 of course, circumstances may vary