Working full-time myself I know what you mean about not sewing of a night. I make sure that I set aside a couple of hours on the weekend as sewing time.
Do not look at the room as a whole. That can turn you off even more. Was there a project that you were working on previously that you could take aside and work on during your own time and speed. Once you have finished off one item it will spur you on the tackle another.
Good luck.