how can i dye my hair full blonde?

hello! my natural hair color is jet black, and I've had some highlights dyed blonde for about a year and a half. honestly, I don't like how it looks anymore, and I'd love to dye it completely blonde. the problem is the regrowth, and the front part of my head is going to be completely black in months. what should I do? if i can't dye it, I'll go back to my natural color. thanks u <3.