I love having the blog, however, since individual blog posts are very separate from the main site it can cause to people to leave the website without obvious options to return to the main site.
To decrease bounce rates, I would suggest including a static navigation bar at the top of the page. A logo would also help for users who land on blog posts from Google Search.
For example, here is a site that is structured similarly to Strikingly in terms of blog posts.
The blog post is still unique to the main site structure but there are obvious buttons at the top to return to the main site.
Instead of just this small "Return to site" button which is hard to notice at best;
Unfortunately, this is the only thing that causes me not to recommend Strikingly to other bloggers.