Sorry for your loss of mom. Been there done that for both my parents and my in laws and my closest aunt. It's not easy being with them as they try to pass away. My aunt told me a couple weeks before she died that she didn't realize how hard it was to die. That nearly broke my heart. My brother and I tried to do the best for her during this time, but one always lives with a bit of regret that you didn't do enough. We moved her from where she lived to another place closer to us, but she only managed to stay there for a couple days before she went back into a hospice situation. I've 2nd guessed that move for a long time as it was a bit disrupting for her. The only thing that helps is that she said she really wanted to be in a new place with a nice view.
I think one of the sad parts of losing all of the generation that begat you, is that you no longer have anyone to ask questions about family and other things of that nature anymore.