fotosharrrrkkkk...welcome to el Hobby as I have come to call it, just now actually, never before.
anyway I like that you're experimenting. I too started relatively recently albeit two years before you. I'm still learning.
so here are some tips any beginner should know:
1. priming a miniature with a hobby spray can primer is ideal as it helps all future paint stick. Citadel black/white is ok. P3 is matte and chalkier, some prefer it. The Army Painter is closer to Citadel and can be glossier with its black...however, they do offer a huge line of colour primers which pretty much saves you a huge amount of time rather than priming the basecoat layer (your first paint colour in your scheme) by hand
if you have an airbrush that's the best, but it's also $$$ and a discipline on its own. I rec' you learn hand painting well before investing. basics!
2. the standard application of paint: primer > base colour > wash > a) layers + highlight; or b) highlight skipping additional colours
it gets more intricate, but this is the foundation. do this on each separate element (skin, chitlin, claws) staying within similar color families for each element
3. paint trios are great for popping an element: dark blue, med blue, light blue (base, layer, highlight), but hobby paint is $$$ so you can experiment with a single colour blended with white/black respectively
4. washes are your best friend starting out, love them
5. less is more, mix paints with water in a wet palette (google it, or even a piece of baking parchment paper), thinner paints in 1-2 coats trumps a single coat from the paint pot every time
also, pot paint consistency varies even within the same line. batches do tend to be different from time to time, so mixing externally saves you trouble/waste and gets you used to the consistency of paint, which allows you to develop your instinct for controlling how it behaves on the mini
6. colour theory is great for later on. looking at tons of stuff is a good way to develop your eye. Cool Mini Or Not, Warseer, Dakka Dakka, etc. have great hobbyists.
Shameless plug time. Here's an article I wrote about my approaches when I started hobbying and how they changed over time. Might be of some help to you: http://hobbythumbs.blogspot.ca/2013/...ar-part-1.html
Keep doing it!!! The world needs more hobbyists.