I tried for the first time to bleach my own hair and I got the blonde roots and most of my hair the way I wanted it but I misses some parts in the back of my head and didn't realize so now I have some dark spots ( Black hair) where I couldn't apply the bleach, how long should I wait to try again and cover that up?

Way better to go to a professional because it's very difficult to bleach your own hair.
I've done it before and it turned Ronald McDonald orange and when I finally went to my stylist to bleach it right it was much harder for her to fix it

Well like I said I really did get the result I wanted I'm only bleaching it to add a red color to it, but missed a few spots in the back of my head, I don't know if I can leave it like that and when I add the red it'll mix up with it or it'll stand out, that's why I wanted to know if its safe to try get those spots now