Your schedule wears me out just hearing about it.
You are working towards a degree so that you can cut back to one job, right?
You plan on getting the house sold, right?
As for your X - if the kids have seen things on FB that disappoint them, tell them to share it directly with their dad. No need for you to get in the middle of that.
I don't know how you could have any time or energy to even think about dating right now - that will sort itself out in time.
It sounds like you are overwhelmed, with good reason. Try to see each thing as one part - you don't have to do it all at once.
Is there any way you can get some respite from the kids and the house and do something that is just totally for you? Even for 1 hour?
Sending strength and peace.