I'm going to ask someone at Sally's but wanted a second opinion. I want to blend my roots into the blonde part of my hair.

I like the thought of Demi permanent bc it won't lift or damage my natural hair but I don't like that it fades. I like permanent bc it won't fade but I don't wanna mess up and be unable to go back. Im thinking about doing demi to get the hang of it then doing permanent once it fades. I've watched YouTube videos and one girl did a demi balyage (idk how to spell it sorry) and I liked how hers turned out. She used an in between shade and put it on the blonde part so it looks more natural. I don't have enough money to go to a hairdresser so it's not an option.