Getting Posts to Display on Blog Page

I am new to WordPress. Sydney theme has been awesome and I like the way I have set up my new website, but I cannot get posts to display on blog page (or on a single page) that I could then add to the top menu. Thank youu for helping me understand how to accomplish this!

My site is -

Looks like you’re not using Sydney anymore. Anyway, just like in any other theme - set a blog page from Appearance > Static Front page in case you’re already using a static front page.