should I dye my hair?

Idk how I feel about my hair 😭😭 it was dyed and now it's grown out. It was damaged badly due to dying it and I've had it trimmed and I've been taking good care of it, not using heat or anything. Now my hair has grown and 2 different colors. I literally have extra 60$ for groceries every week and I don't have the money to go get it done professionally. Or the time. 
I know how to do it myself with box dye, I've been doing that since I was 14 and the last dye was box dye. but I don't want to do anymore damage to it. Does it looks at bad as I feel it looks? Edit: guys I have never been blonde, my hair was a dark brown and faded into this so I'm scared if I do something to lighten it, it will lift all the past color out of my hair and turn it organge or yellow, so much worse than this.