Welcome to Armorama, Voltec. Glad to have you with us.
As mentioned already, thinning is more for the airbrush than the paint. As for which is better, I think you will find it's a matter of preference, and what you become used to. I use enamels, because that's what I started with, and now feel comfortable with. I did buy some acrylics (because of colors I couldn't find in enamel, and just to try them out) and found them to be very good as well, once you become aware of their characteristics. If I were you, I'd see what is readily available to you in your area, and concentrate on that medium. Being able to get the paint you need, when you need it, is important.
Mike