Hi there, you wrote an introduction post a few weeks already and there is no need to write one again, or one for each community as all your content can be read by everyone on Hive.

As a newbie I'd recommend that you focus on building your network by engaging more with people instead of posting all the time. And also avoid post too often every day, 3 posts a day can be considered spamming on Hive. I have a post pinned on my blog that includes tips for newbies, it will help you with your Hive journey.