Please note that Google needs some time to update their index. Also, WordPress.com has no control on how your site appears in the Google index and in which position, so there wouldn't be a way for us to physically change this.
But, after looking at your site somethings do stick out to me. Your posts are set as links on your Archive page:
It's impossible to find your posts without going to that page. Is there a specific reason you set it like this? What you can do is have a specific Posts page which will allow readers to easily navigate your site and read your posts. With the current state, it's a bit difficult to read your posts.
In order to change this you can publish a Page titled anything you want (a lot of users I know title it Blog or Posts). Then set that page as the Posts page by going to Settings > Reading in your Dashboard. Then all your posts will be there without having to do all those extra clicks. In my opinion less clicks, the better the experience for the reader.
Also, if you want an Archive of some sort, check out the Archives Widget. This is a great way to organize your posts by date. If you don't want to organize them by date, you can also organize it by Categories using the Categories Widget. Take a look at the links to see if it works for you!
Feel free to reach out if you have any questions!