Simple Stuff!? Are you kitten me? From the looks of it, you are grieving. I think that you have to go through that process properly, hopefully with someone(s) in your real life. You have accomplished A LOT, since your mom passed away. Things get you feel that way for now, we understand.
I'm sure that people have talked about grief and its importance virtually everywhere, despite that, I suppose you have to take your own path to the recovery.
It may seem counter intuitive to do more when you already feel overwhelmed, but maybe you can find the time to watch this Alanis's video, then I hope you write/paint/draw/sing, and you live your life beautifully.