Oh, I am so, so sorry! 💐
I am 51 and my second parent died last year. I am not married and have no kids. I do have a sister with three kids, but she lives thousands of miles away and has no spare room.
I find that the key is to just live your life doing the things that you enjoy, and - this is important - getting involved with your community. Lots of group stuff. Could be volunteering, could be area beautification, could be hospital volunteering, and then there are book clubs and such. If your parents are gone and you don't have your own family, then it's important to live what I call a well-peopled life.
However. That is for the future. Right now, you are reeling with grief. I was absolutely destroyed when my mother died 12 years ago. I thought I would never get over it. I lost various friendships because some treated my grief like it was nothing while I felt like I was journeying through hell. My life changed utterly and forever.
And you know what....miraculously, time healed me. It's a cliche because it's true. I thought I would never, ever get over it, but eventually, the world seemed the right side up again.
In my worst moments, I had the thought that it was better I suffered this bereavement rather than her suffering on and suffering on. (She had cancer.) I would not have wanted her to linger any longer.
Your mother may no longer be here, but you still have all the love she gave you. It's yours to keep, forever.
Poor OP. You will not always feel as bad as you do today. It will get easier, although it will take significant time and you'll have to be patient. I found that distraction was key. There's no shortcut through grief, nothing you can do to make it better or hurry it along, but on your better days - and there will be good and bad days, with no rhyme or reason - on your better days, distract yourself with a good film or something.
With both my parents, I found the 4-month mark to be very hard. Maybe that's when it sinks in more. Anyway, forewarned is forearmed.
Sending you many, many soft and gentle hugs.
P.S. I had the funeral home take a lock of hair from both my parents. Just wanted to mention that, as it's something you can't arrange later. I rarely look at them, but I find them very comforting as tangible proof of their former existence, as sometimes it seems like they were a dream.