Honestly, it's not worth it
I've wasted money at the hairdresser once as well. Didn't come out any different than when I tried it. It didn't go ginger but it just didn't look very nice.
I think I've got the hair type that doesn't take very well to bleach. I think the hairdresser said it was very colour resistant.
I really wish I could liven up this mass of dark hair. If it was nice and smooth, I wouldn't mind so much
I've tried at home, I've tried at the hairdresser. It's just not worth it.
You should be alright to cover it up with a semi for now and then do it properly when your hair is recovered a bit.
oh, and while I was sitting at the hairdressers, waiting for fucking hours while the hair tried to change, someone came in crying, with a hat on, and asked what they could do about her hair which was breaking off in chunks after she bleached it.
They were very kind to her, but they did say she needed to cut most of it off.