The only thing I don’t like about that versioning system is the ambiguity that can sometimes arise due to different interpretations of what the numbers after the first dot mean.
You could either say: It’s a decimal system, therefore 3.4 is bigger (comes after) 3.13. (3.4 > 3.13) or, The numbers after each dot are independent, therefore 13 is bigger than 4, so 13 is the newer release.
It’s usually fairly obvious from changelings but every now and then I get tripped up.
I’ve been hiring programmers recently. A year or two experience wins out over a degree almost any time. I don’t know if there are any developers (or even website administrators) at you current job, but if there are I’d see you if you can start by helping them out, maybe helping out when they’re on leave or picking up little jobs and then you’ll get your foot in the door in no time at all.
Actually the last dev I hired had no experience at all, I just really liked him, and he’s turned out brilliantly.