Please report
white_[x]_rabbit
to the mods and ignore him for now. He is really counter-productive.
After he is banned, clean up your posts so we have a clean history.
Here is the high definition image with my markings:
i am sure there are letters on the cross (phoenix neck)
download the image and zoom in to see the numbers and letters in the markings
https://imgur.com/a/m4i4lEven with your marks I can only see that Ld things. Seems I am blind

.
Maybe you can redraw the letters you find with red so we can actually see that letters on the image.
However, I dont know if this is a real clue since its so hard to see. We need to keep it in mind anyway. If we find even more of this it might be of importance
If I were able to get a 256 raw key made of 0s and 1s out of this picture, how would I convert that to a private key to import into blockchain.info?
You convert those 0s and 1s to hex and there you have your private key. No magic involved. If blockchain.info does not accepts such a key (I think it does) you need to convert it to wif format (explained here:
https://en.bitcoin.it/wiki/Wallet_import_format).