Just start. When I'm not motivated to quilt, I just go into the sewing room and sew a seam, organize more, or cut a piece out. That usually gets me started.
I know when time is limited it's hard to juggle it all.(and since you work with fabric all day there are times when the last thing you want to see is more fabric).
Find a small project to get you going. It will come. Don't fret much over it. You have 2 little ones who treasure you.