How To Make Gaiaonline Avi Art

[PIeasant]

I Made An Account On Photoshop,

I don't know how to draw on it can someone tell me,
How to work photoshop for drawing avi art or tell me what to do,
to get to the art section on Photoshop.
Also, what other websites can I use for avi art I do not own a tablet.
Also, I can not buy A drawing set.
I tried Paint Tool SAI but it said " SAI can not continue because this is not administer."
Ok so can U guys tell me what websites to use ;D IT HAS TO BE FREE! ;D oki doki lol