Read, research, and digest first, then post. Maybe spend 2 weeks doing that until you have a good understanding of the ins and outs.

Find your group/tribe, people who do things you enjoy.

Comment, comment, comment...don't sh*tpost spam crap, be genuine.

Finally, make an #introduceyourself post, explaining who you are , why you came here, and what you can maybe bring to the table.

Be nice to others. Otherwise you'll find out quickly why that is.