Have looked at tutorials. They are very good and got be started. I am trying to make a section of the Great wall of China. On thing was how do you precise make curves and straights in the canvas? Also what setting makes it perfectly straight up? I checked settings but could not figure it out. It always makes the sides slanted. I Used GIMP to do the test by drawing a wide line then one darker and narrower that it right down the middle. It sort of worked but the sides were slanted.
I got a good brick texture which looked good.