Ok... so I was out in the forest at my grandma's ranch when I saw this egg, which turned out to be a robin egg, in the leaves on the ground and I couldn't find the nest anywhere in the trees around me...

So I took it home with me and made a crude incubator in a box with some fluffy stuff, like cotton balls and fabric, with two warm rocks on either side of the egg, wrapped in fabric and a warm, moist papertowel over the egg to provide some humity, but I have absolutely no experience with this type of stuff so do y'all have any tips for me if you have dealt with something like this?

Update: The egg was damaged when it fell out of the tree and it got cold even before I found it so I decided to give Rylee, the unborn robin in the egg, a burial by burying it under some dirt in a little container over some flower seeds