Just looked through your blog (been really busy) as I like to try and keep an eye on new painters.
Paint
Although your paints are cheap they will cost you more in the long run, you wouldn't paint your car with cheap paint would you?
GW is the most expensive paint but there are other makes Army painter, Vallejo etc and they are all much better than craft paints, craft paints are fine for terrain and scenery projects.
Primer
2 thin coats are better than one thick coat, you get better detail and a stronger colour.
Shade
When you shade don't apply too much you don't want it puddling on the model
Drybrush
You want the brush to leave no paint trace on a tissue again 3 coats of drybrushing is better than one heavy coat.
Overbrushing
This is when you leave more paint on the brush than dry brushing but apply it the same, good for adding layer colours on simple models.
I will leave it there on techniques for now.
Your shield
*The good neat colours on each section
*The bad paint is too thick clogging detail
*The ugly the gritty finish will show up when you drybrush.
(* Is for the benefit of
@Warden I'm pretty sure he will love the titles)
All in all you have made a great start, but a bit of advice on paints don't rush out and buy 20 pots buy one or two and build your collection slowly get the primary colours and mix them if needed.
Keep it up anf get some more pics posted
.
). 
.
