I am so sorry op 💐
It will all be feeling very surreal at the moment.
You might find periods of time where you're absolutely fine, because your brain hasn't processed it yet, and then other times where its all you can think about.
I always think the time between the death of a loved one and their funeral is the oddest time of all, you're still doing things for them, planning a funeral and flowers and thinking about music etc, so ime it's just after the funeral that it really hits home.
There are lots of charities where you can get support, and it might be an idea to check in with your gp, if you feel like you need some support to sleep.
At the minute just take things an hour at a time, don't try and put on a brave face and alow yourself to feel your feelings.
This is a path that, unfortunately, lasts a lifetime, so don't pressure yourself, just take your grieving at a pace that you're comfortable with, you will get to wherever your new 'normal' is when you're ready.