You should get a welcome email when you sign up to Patreon that gives you a link to the forum. It says:

I try to answer any questions that come in, but having so many places to check does mean I miss them occasionally. The cycle.travel forum at https://cycle.travel/forum/2 is the best place to ask if you have any questions about cycle.travel.

Failing that, there’s a link in the footer of the cycle.travel homepage and most other pages on the site, and another link on the homepage.

(I would add, though, that I’m very aware there’s more that can be done on the help/support side of the site, and will be rolling out a new help system over the next few weeks!)