Have you got the updated version of Oekaki???
If not grab it here =)
(ChibiPaint v2.0)
And here is the best Oekaki guide
for anyone else, with tool realted issues, all the best information is always the first thread that pops up in Oekaki forum, if you want to be the best you must first learn how. Chicken Smoothie has everything layed out and so well detailed and easy to read. =D
Edit: But never be discoraged, practice always makes perfect =)