When you say "I can't claim to be knowledgeable or even comfortable with Linux" I agree with the ac, Mint is a good choice. I claim to be reasonably knowledgeable about and comfortable with Linux, but I don't have time to want to mess with every little thing. Mint gives me a reasonable desktop quickly, with good hardware support, so that I can spend time doing the things I actually use a computer for rather than troubleshooting drivers and suchlike.
For servers I use CentOS, for desktops I use Mint. But if you prefer Debian for either, you should use that.