Hair loss & dents in scalp due to steroid injections. What can I do to resolve this? (Photos)

After covid, my hair started to shred in massive chunks and you could see my scalp. I was told I had Telogen Effluvium and maybe one tiny spot of alopecia. Had steroid injections in my scalp for hairloss and noticed my body didn’t react well to them. I now have dents in my scalp and little round, red circles of hairloss. I read the hair can regrow but there are no explanations on what I need to do to accomplish regrowth. What do I do to remedy this? This made my hairloss so much worse!