Gah! No, chuck that stuff out the window.
Don't use enamel on miniatures-- it's not designed for fine detail, and it'll make them look chunky and clunky. It also leaves a high-gloss finish, which most folks don't care for.
You're after water-soluble acrylics for miniature painting. Citadel is mediocre at best, and is rather overcosted. It also is poorly packaged-- pots dry out quickly, whereas eyedropper containers don't. If Citadel is the simplest thing for you to pick up, then by all means, go for it-- it's perfectly usable.
However, I'd look into either Vallejo Game Color or Reaper Master Series (the two are functionally identical, right down to range and packaging.) They're superior paints, are packaged in eyedroppers so you have much more control not only over how much paint you're using, but in what proportions, so it's easier to get accurate and consistent mixes. Like I said before, eyedroppers don't dry out, either, since there's little to no air exposure in them. They also tend to run about $1-$2 US cheaper than a pot of GW paint. I pay $2.00 for a thing of Reaper Master Series, which is less than MSRP (I think MSRP is $3.00, but don't quote me on that), and Vallejo's MSRP is $3.00 as well, I think. Citadel paint runs $3.75 a pop for the regular colors, and $4.25 for the washes, foundation paints, and metallics.