Any Tips for Home Painting Project?

depends'n whether there's a smooth surface 'hind the wallpaper 'r if'n such's already textured. i did momma's dinin' room wall which sadly t'weren't textured, but smooth whilst the rest 'f the place (the paper t'was jest'n one wall) 'd a deep texture. took me some time to 'master' a technique that matched the rest 'f the house. i used regular drywall mud 'n a box to practice'n. then there's the sandin'/clean-up. i read from below that'cher atop the last rung 'f the ladder tended to this? please do use great caution, aint safe to be't the top. ms. @Corbin5 already gave ya great tips fer the actual paintin' part :)