This is my process : )
Choose a new color and pick up a bleaching kit.
Bleach the ends to erase existing color at home.
This is usually when I make an appointment for a trim to cut off any damaged ends before I put on the new color. This way it looks healthy and clean.
At home, put on new fun color and touch up every week depending in how fast it fades.
And that’s about it.
Also, I wash my hair in cold water in the tub with my head flipped over. Then put it all up in a bun to take a warm shower.
I have no idea is this is the “correct” way to do this — but it works for me.