Other than all the advice above, get some cardboard and roll some tube and other shapes to practice on. Get a fell for the paint delivery of the can. Work in passes, starting off to the side and once the paint is spraying smoothly then pass over the item to be painted. Then once off the other side stop spraying (or make another pass). Making sure you don't stop and start on the model will help to prevent drips, and overly thick coats. Make sure you practice a bit with the cardboard to get a good feel for the can spray pattern and speed needed for good coverage.

Duke