Be careful with some people who comment on your posts. A good indicator is the reputation value besides their name. When starting off, people are at 25 and the more people who like your posts and give you upvotes, the greater your reputation increases. OR. It can go the other way like @berniesanders. The best reputation on an account I have ever seen is a 72.
Here is a post that goes over many of the basics of Steemit.
https://steemit.com/steemit/@crypto-notloc/understanding-the-basics-of-steemit