Welcome, @trinh , great to see you at last week’s All Hands and here in the forum. I promised to share with your 1) the formal part of becoming Operational Members: see here our policy and 2) our roles & responsibilities: in this hackpad.
So basically it gets down to define what level of contribution / commitment you’d like to make - this could be a combination of monetary contribution and time to commit to at least one of the Circles. As you suggested there’d be a natural fit for helping with the outreach / marketing and possibly with the community programme. It’d be great if you would have some hours to dedicate to that over the coming months and then of course we can evaluate as we go.
Let us know any doubts, ideas or suggestions you may have. Best, Wouter