If you click on your blog in the upper left-hand corner you will see the link "home".

Once you click on "home" you will see a list of Tags and Topics on the right side of the screen. Scroll down to the bottom of the list of topics and click on >Show More Topics

Here is a screenshot showing where to click

That will take you to a page with all the topics listed on Steemit alphabetically that looks like this.

Click on the topic that interests you, read the posts, and begin to engage with people. Hope this helps and welcome to Steemit.