Someone else asked me this question recently.

"Well, What you doing now is a good step forward. You make comments on people's post. Interact with a post that you find interesting. The more you interact with people here the better you will do. Also, try and post at least once a day. Maybe just pictures you took of flowers or a poem you wrote. Or your opinion on something, someone, or location you live. You might not find it very interesting but people from around the world who never been there might find it interesting. Don't give up too quickly, stay with it. If you are not putting content out, don't expect Sp. There are also contest you can enter or you can start your own contest. That is how I would start."

Everyone on steemit write post that doesn't make money. Unless you got money to become a whale. Write at least one post a day about something you find interesting and tag appropriately and people will find you. Combine that with reading post you find interesting and interacting with the writer and following people you find interesting. It will take a while but you get there. I am on the same journey.