Look for post about topics you know and post good answers to the comments of other people. No cheating, like using AI. Not too long and not too short, let's say 3 or 4 sentences.

If you see a topic you are interested and have an honest question, make a comment.

If you find something interesting, you can make a new post, but it's difficult to know what the hivemind will like. A technical post with some relevant graphics or photos is a good starting point.

Avoid too much self promotion and posting too much. For the first month don't post more than once per day (or week), until you understand what is considered interesting. (It's not a hard rule, but it's hard to find too many interesting things to post.)

you get the upvotes for your comments and part of the votes for your submissions. Comment downvotes received are also deducted from your carma, but have a floor (5 downvotes before the comment is dead).