What are my best options for getting dyed brown hair blonde?
You probably don’t need color stripper, as it has been a while since you last dyed your hair. Just get some bleach and the highest level of peroxide available. I think it is 40. You are not doomed, but it will take a couple dye sessions to get your hair just right. Try to avoid ash colors, as changing it back will be a hassle because it will make it easy for your hair to turn nasty green.