The salon is more likely to not screw it up. You can try it yourself, and if it doesn’t work out well have the salon fix it. I always recommend a semipermanent like Natural Instincts, if you buy something in the drug store. That way it washes out in 6–8 weeks, no grow out line at the top of your head. Know that colors usually come out darker than you expect them too, so buy a color a little lighter than you think you want. Get a neutral or cool brown if you want less red.