New to Lemmy

You should share posts, graphics and media from your blog to the communities you think would be relevant to the people visiting there.

You'd take flak if you try to share your blog in Generic communities, because just trying to get eyeballs on it in that way is inappropriate self-promotion. But if you post on a relevant community, especially in a niche one, then users can subscribe to there, and are there because they want to see posts like that (otherwise they can block), and you'll get the occasional visitor from the All feed which is a fine bonus.

The other piece of advice I have is try not to post too much at once else it crowds the Hot feed. An ideal amount if you have a lot to share is a few times a day.

No such thing as a dumb question regarding rules. I know I'm not answering your question, but really, ask these kind of questions. They improve the written rules.

Mastodon might also be a good place for promoting your blog though over there you kind of have to first make a name for yourself to get found, as far as I understand.

There's totally a space for that kind of thing around here. Hell, you could even make your own community specifically for it if you're so inclined.

Were you looking at a specific community?

I can't speak for everyone, but if your blogpost are on topic for a given community, I would take a less strict approach to any no self promotion rules.

Are you talking about some community-specific or an instance-wide rule? Which community/instance? You should probably ask the mods/admins directly.