If you just need a basic blog, you can choose Blogger. It is one of the best platforms for Free Blogging. Even though it has so many limitations, it can be a great choice for beginners who are looking for creating a personal blog.
In case, if you need to customize your blog according to your mind plan, it is better to choose WordPress keeping in mind that you need to spend money to keep your blog or website online.
WordPress has lots of features which are not present on Blogger Platform. WordPress has the flexibility to modify your website in any way. You can even create an e-commerce platform with WordPress.
WordPress allows you to install any third-party plugins and allows you to completely automate things like sending emails to your users/customers.
Both platforms are easy to use and very beginner-friendly for anyone to try. WordPress is opensource and it offers lots more feature. On the other side, Blogger is owned completely by Google LLC.
When it comes to security, bandwidth, CPU usage, etc… You need to take care of all of these on WordPress platform, whereas you need not worry about these when you are using Blogger.