Reece, when I did my first installation of Linux Mint 17 over one year ago, I messed up to choose correct location for the boot loader, and so ended up a bit like you: booting did not work. Your case reminds me a bit of that. I found very detailed and friendly help, step by step, in the primary German forum for Linux Mint.
For the English world, the international primary forum seems to be here:
https://forums.linuxmint.com/
Check for the Newbie section whether they already have an article on it, else ask, as detailed as you can remember. They will talk you through in all detail, I'm sure. They surely did for me - and back then I was completely lost for one day. They rescued me.
Just do not criticise Linux, even when you have valid points. The Linux crowd is a bit - elitist, and touchy, somewhat.
Else, Robbins is right, never put Windows (even old Windows versions!) and Linux on the same HD. Always two HDs. Always install Windows first, Linux second. That is consent out there, and you find this advise in every book on Linux.