Hey, those look great, I know the trend these days is toward the pre-painted minis, so we are always looking for those able to keep this great and dying art alive. There is lots of great advice out there, I grew up reading "Through the Looking Glass" in Dragon, and "Heavy Metal" in White Dwarf, but it all comes back to firsts, and while I don't still have my first ever miniature I painted, (it was a Werewolf) I do still have my second one, now 20 years later:
This one was done with Testors enamels on bare metal with plastic bristled brushes, I cringe at the thought these days.
Here is a handfull of my more recent ones, what a difference 20 years behind the brush makes:
You are off to a much better start than I was, and now with the wealth of information and tutorials available on the Internet these days, your progress should be much quicker than mine!