Well, most of the questions people have at first can be found under the faq page, the posts and comments that you will make are by default formatted with markdown, the rewards at your posts depend of the people who upvote and how much Steem Power they have. You can see everybody's money in their wallets, at each one's page, and payouts are made after 7 days since the day when you made the post.

There are a lot of things to learn, as I said, and I tried just to give you a few start informations but I will let you try it yourself and see if you get stuck :))