Still, now, I have designed several blogs, but I would love to share my blogging, web development and designing journey with you. My first blog with a Blogspot one and I remember I didn't work a lot to improve its template. Then I purchased a domain and designed it at web builder provided by the web host. Yes, it was again not worth looking. Due to personal reasons, I didn't pay the hosting and domain registration bills, and it expired.
After losing my job, I decided again to design a website, and this time, I used WordPress CMS, and it was a good experience. Again, I don't have that site because hosting expired too. However, from the last 2-3 years, I am running many sites, few are WP ones, and few are PHP ones. As we are about to face the second lockdown nowadays, that's why I am working on a PHP which is about location-based information for moms. It is the first time when I am working on geo-specific site that's why I am thinking to fetch US postal codes API from here. By the way, GeoName could also be a source, but this site is also offering to fetch data. Hopefully, I would design and build this site successfully very soon.
Moreover, I also have a dream to make a web portal in Django that's why I am also trying to get some time to learn python. Hopefully, this lockdown would assist me in getting some time to learn python. However, if I address your question, then I don't think freebie templates are worth using, but as a beginner, you should try them. Later on, you should try to design your template your own with the help of different web frameworks.