Both Blogger, and Wordpress.com have official themes you can install, but Blogger's are very dated looking. If you want thirdparty themes you can install them directly through Wordpress.com. Blogger on the other requires you to search the net
, hopefully find something that isn't a virus, and then upload it from your computer to your blog. It's nice that you can upload external themes though. Getting a Blogger blog requires having a Google account which means you'll need to verify your account with a phone number. Wordpress.com only requires an email address.
License:Comprehensible Open License 2.0
Comprehensible Open License 2.0:
Material provided under the terms of this license can be used, modified, duplicated, and distributed, provided the material remains free of charge, and the author of the material is not held responsible for any consequence of using it.