Markdown are basic ways of segregating your post to look more neat and easier for people to read. Some of them like how to bold text and heading are already on your dashboard where you create your post.

Check out this tutorial by @mistural on markdown here. And for more practicality and better understanding check @starstrings01 video tutorial here.

I'm sure it will educate you lots about markdown. If you still need further assistance after then you can kindly reach out to me as well.

Best regards!