How to fix paint after patching holes in the wall?
First off, you need to get those patches even with the rest of the wall and that's hard to do if you rely on sanding them down. get a mud knife larger that the patch so you can even them out with one swipe. As far as the orange peel effect, I've had great luck running a small nap roller lightly over the mud after it's had a short time to stiffen up. Then roller prime and roller paint. Good luck