Tips for my hair

So my hair is a dark brown with a lighter brown or Carmel high light. I did this to cover up over black. I was dying my hair blonde on top and black on the bottom for about 4 ish months then I went to purple then I went to black/purple or blue black depending on what I decided to buy at the time. I want to get at least the top back to blonde if not all of it. I do not wanna go to a Salon it’s expensive and I just can afford that anymore. Just wondering if there is any tips or tricks I can try to do it myself. I’ve posted a photo of what it looks like currently for better feed back! Thanks!!