Hi fred2018, welcome to the forums.
I'm sorry to hear about the loss of your Mother, my condolences.
I've lost loved ones myself, so I know how you feel. I lost my Grandparents (Mum's Parents) in 2013 (my Nana) then 2015 (my Grandpa), my Dad's Parents passed away before I was born (I'm 20).
Whilst I don't live in my Grandparents house, I've stayed there before and been there after they've passed, and I totally understand what you mean. I still feel like they're here too and I can see and call them, then reality sets in, it's sad.
It's hard to move on I know, but there's no time limit on grieving. Maybe there will be some good memories in the childhood home, as sad as it will be for you. I wish I could give you a hug and help in person.
Perhaps just try to look back and reminisce on all of the great times you shared with your Mother and as a family? I know it's heartbreaking knowing that you won't have memories like that again and you won't be able to recreate them, but sometimes it helps, for me anyway, just like telling myself there's no time limit on grieving. Or sometimes looking at stuff that reminds me of them.
I can't even think about them some days let alone the house or anything that reminds me of them, it's just too triggering for me. But everyone's different and everyone has different coping mechanisms. I think you sound strong mentally and physically, because you joined these forums and made a post (good on you for that, that's an achievement and brave in itself) let alone moving into the childhood home.
I hope things work out for you and you feel better. I'm sorry that I can't be of much help and give much advice but I hope it's somewhat helpful to you. I care and I'm here, I'll do my best to support you in any way I can on here and anywhere on the forums. I hope to see you around on the forums.
Take care, good luck with the moving. If you'd like to chat I'm happy to, about anything.
Best of luck with things, I hope things improve.
Love and hugs, sorry I couldn't help much.