It comes with a preinstalled browser (Firefox), so if you only use your computer for online stuff, then you dont need to do anything at all. Just use it.
The only technical thing you might want to do is to enter the WiFi password and find the software manager to install any additional apps you need.If you can install apps on your phone, then you can also install apps on Linux Mint.
I actually found that it was a lot easier to install Mint than setting up a new Windows pc. The most difficult part was using a windows pc to download it and making a bootable USB stick. Your friend can help you with that or you can follow a guide.
I have had zero issues and I have never written a single command line. It just works.