Also read the very nice Corel Painter newsletter, "The Painter Canvas". In each issue there are tips and tutorials. On the page linked below, you can subscribe and receive the newsletter via e-mail each month. Click the "Sign up" link near the bottom of the page:
Tutorials and demos for Painter 5/5.5 Painter 6, Painter 7, and Painter 8, Painter 7 information, Painter Developer John Derry's Painter 7 Visual Guides for Water Color, Liquid Ink, and Keyboard Shortcuts to download in PDF format, and custom brushes for Painter 6, Painter 7, and Painter 8 to download at PixelAlley
Spend some time looking through the Painter User Guide just to get a general idea of what's in the chapters. Then keep it nearby and look things up when you have questions. If you can't find something, or you do find it but don't understand it, post an appropriately titled new thread here and ask.
Make the User Guide your friend. It won't be long before you'll know the terminology and where to find things and it'll save you a lot of time and frustration.
If you don't have a hard copy User Guide, inside Painter, go to Help > Help Topics and there you'll find the Painter User Guide in HTML format.
Please do not PM me with Painter questions. Instead, post them here where everyone can benefit from them. Thanks!