Glad to see you in here. Had I known you were unaware of the forums and gitter rooms, I'd have invited you personally. It's never too late to join this community! Most of us are learning something new each day; and if your brain gets full, you can share the goods with the rest of us.
But one thing I'd like to point out, Xiaofei. The Adapt Meetup London 2017 was held as the very end of this past January. It's not an ongoing event. Hopefully, it will be the impetus for a user group or for more meetups. But nothing is yet planned.