pcpunk, there is a huge difference in updating/upgrading software in Puppy than Linux Mint, a wide gap, so much that I cannot do it.
No, I take the last of the above back. There's an outside shot of me doing it, but not the desire. While FatDog64 is great out of the box as a bootable secure OS & the team less than a 30 minute drive away from me, they also release a new version on fast enough a schedule to where, for me, this is too much trouble for what it's worth.
Going from Mint to Puppy is similar from jumping from a simmering pot of water into a hot cast iron skillet of oil, hot enough to fry fish in & then some. Which is why all I use FatDog64 for is diagnosing computers and/or making a fast, secure transaction. It's way to much for me to learn, for what it is. Yes, it's powerful & fast, but graphical enhancements are missing & I simply prefer full releases for every day use.
I'm not in any way, shape or form trying to discourage you from wanting to learn to use Puppy. However, if you think that learning Mint was a ride, you're getting ready to be pushed beyond every limit you've ever seen, just to get through the door, let alone begin to get anywhere.
These bootable ISO's are kind of fun to play with "as is", other than that, you're best off staying with Mint. It'll do all you need, and you can even boot from it the same way, if desired.
I like FatDog64, but only as is, it's plenty secure enough even if the browser is a version behind.
Good Luck, regardless of the path you choose.