If all you need to do is browse the web, there is really no reason to use Windows (or keep it). Linux and Google Chrome for a web browser will work very well.
Burning a DVD for the installation is simple, and so is making a bootable USB drive. You will need the 64 bit version, and I agree with Larry that the "Mate" desktop is what you should use.https://linuxmint.com/edition.php?id=220
One thing I will caution you about - do not just erase all of the partitions on the hard drive. One of them is likely a system restore partition, and/or for hibernation. You should be able to use the partition currently used by windows, which is likely the largest one.