

Definitely already looking better! Plants are super resilient!
I also recently got a half dead orchid at a plant swap that I am nursing back to health. It has one leaf left and one baby one coming in. Had to cut off so many bad roots but it looks like it’s bouncing back.
That looks like scale to me. Using isopropyl alcohol and then wiping them off should usually take care of them. You just have to thoroughly search as they can also be hiding in the roots.