I don’t jump into new group associations very easily. I tend to hang back once I’ve joined and get the lay of the land to see how things works.
It’s not because I don’t have anything to contribute it’s because I’m trying to figure out how and what I am expected to contribute.
You can join a new group on LinkedIn, SLACK, Meetup, EventBrite, etc, etc and immediately start asking for people to check out the new site you built, review your resume, let you write a blog post for them, etc, etc.
Or you can start asking what you can do for them, what you can do to help with the group, how you can contribute to the work of others before asking (or even demanding) what other can do for you.
It’s not a perfect approach, but the results might help you get to your work sooner.