Heya welcome to Linux and LQ
I would recommend downloading Mint 17. It has just been released a week ago and will have 5 years of support. Mint 15 is no longer supported and Mint 16's support expires in July. Mint follows Ubuntu's release schedule. This means each 6 months a new version. Normally with 9 months support. But every 2 years they release an LTS (Long Term Support) version. Of which Mint 17 is an example of
Could you list the CPU, amount of RAM etc. So we can figure out which version of Mint 17 would work best on your computer. 32 or 64 bits. Judging from your post it would seem to me that 64 bits Mint works, but you might be better off using the 32-bits if the printer and software you use don't work.
And I agree with jross. I'm no master on Linux myself. But I did learn how to get it running
Just as I've learned how to use Windows all those years ago. And trying out several different Linux distributions over the years I've discovered that Linux Mint is very easy to set up and work with.