I agree with
@micstrachan @rebrascora and
@azygous
The soaking, cleaning, applying ointment and keeping her in the dark is good advice. Keep her drinking. The calcium will hopefully help with contractions.
It is hard to tell if the blood is from torn tissue, other chickens picking at it or something else. You will want to keep her separated.
As mentioned previously, it is very important to keep the tissue moist with ointment/prep H, etc. and not let it dry it - it can become necrotic and die. Sometimes a prolapse that severe can take several days to shrink enough to go back in, so don't get frustrated if it doesn't immediately go back in. Let her rest between tries and watch that she doesn't get too stressed.
@CorvusFarm an avian vet is always the best choice. If the OP has the funds and a vet in their area that is
willing to see a chicken, that is a great option. Unfortunately, sometimes vet care is not available or just plain too expensive. We all wish these things were not true, but it is. Sometimes the only thing we can do is to give the best home care we can, hope for the best - then if needed, make a tough decision and kindly put a beloved chicken out of their misery.