Sorry this happened. Others are right: TLC and the passing of time will do wonders.
Many years ago I succeeded in bleaching my brown hair platinum blond. But at a cost. It felt like straw and it lost most of its curl (reminds me of your experience). Soon after I got the "genius" idea to try and dye it brown again, on a whim. Only it turned out the color of the following smiley ... Wait for it ...
Yeah. Just awful.
Please remember that this is just one bad hair moment in your (likely) long life. If your hair doesn't recover, it will grow back. Or it could still recover. Either way, like you said, you learned a lesson about bleach and won't repeat the mistake.