So i just got my Wacom Bamboo Pen in yesterday and have been enjoying playing around with it and getting used to it. Well, of course it comes with Painter Essentials 4. I have a few questions just on the program and some issues i am having.

1. Which brush is the optimal brush to use for typical sketching/Drawing?

2. Everytime i make a brushstroke, i get this nasty white fade on the ends which stands out and look horrible. How do i fix this?

3. If i try to make strokes over other strokes, half the time my new strokes turn white. how do i fix this?

4. Any "setup with a tablet" tips will be much appreciated, as i am a beginner and want to try my best to create art even half as good as what is on this site. Its very inspiring!