Hi, and welcome to the forums.
Can you describe what sort of issues you're having while painting? And please let us know what type of paint you're using, as some types of paint (eg. Tamiya acrylic) don't necessarily brush paint very well straight out of the bottle, but with a little preparation and care in application, one can obtain better results.
(If you're using Tamiya acrylics, this may be of assistance: /forums/992589/ShowPost.aspx )