Ouch, life gets rough sometimes. Hang in there.
Oil changes are easy to mess up, my dad one time put in the new oil without closing the drain and it all drained out the bottom.
My supervisor at my work area (I work in my college's maintenance warehouse) just put me in charge of the other student workers in my area, I'm having fun trying to figure out what to have them do since I'm only there two days a week but supposed to supply them with stuff to do for the other 3 days. Supervisor said he's putting me in charge so I can learn how to manage people, so I guess that's what I gotta do :D.
Good luck with life, hope it gets better!