You've basically touched on almost all what one should do on first day on Hive. What I appreciate and would emphasize a newbie should do is reply to every comment that is left of one's introductory post and going forward. I find replying to comments polite and very sweet which invariably build relationships.

And just be yourself above, no one is best here, we are all trying to get better by the day. Hive naturally pushes you to get better.