I need experienced opinions

So this has nothing to do with reproduction, but I know I can always come to Glow for the best girl advice! I can't get the hang of dying my hair, and I need your help. I dyed it dark brown for my wedding about 2 months ago. Now I want to dye it a dark auburn color. In the past, if I dye my hair dark, it won't take color well the next time I try to dye it and it will only change the color of my roots. Is there any way to strip the dye from my hair so it will take the color on all of my hair? Any advice helps! Thank you 😊