The “Get Involved” page on the website is still rather unfriendly. How about reducing it down?
First, if you’ve clicked “get involved” then you want something more than signing up for the mailing list, so presenting that front and centre might be the wrong thing. Maybe better to get people to come over to Discourse to take part.
The second thing is probably to move the volunteer ideas from trello onto the page itself, as an accordion of ideas with expandable descriptions.
That would mean the page becomes a “here’s where to join the conversation” and “here are some ideas of things to do”. Much simpler, and only one primary call to action (discourse).