My sincere sympathy, I myself was there 4 years ago.
You will get through it, but please do not give a second thought to what others say you can or can’t do. We are all different and while their advice might be kindly meant, you are your own person.
If you would like family to stay with you -do ask. You may welcome the opportunity to talk about happier times, but take it one step at a time.
I hope it can be a celebration of your DH’s life, that would be lovely but there is no taking away from how hard it is for you.
I felt (and still feel) like an “unwilling refugee in a strange country”
There are quite a few of us here on GN and we will offer whatever comfort and support we can if you would like us to.