As a newbie it would be good to spend a bit of time reviewing the documentation, here's the link
http://www.abantecart.com/ecommerce-documentationBe sure you read the system requirements and the part about file permissions. These are important settings, and will effect how well your site works.
The Documentation section on Settings will help you make the changes you've posted here.
The Name is in the System > Settings > Details tab. This is also where you change your phone number for some of your pages. The Logo is changed in System > Settings > Appearance tab
The About Me and Contact us on the Home page blocks that need to be edited - you can learn about this in the documentation in the Design section.
This is a great cart, and has powerful features that allow you to easily customize your store, but you will need to learn how it works to take full advantage of this great open-source free ecommerce shopping cart.
Lee, just another happy Abantecart users