Welcome and let me say that writing is good therapy for your loss. Both of my parents passed within two weeks of eachother recently and it does (will) take time. One thing that works for me are writing prompts, this magazine gives some good ones, and reading books about writing. A good place to find some cheap are the local library book sales. For a busk or two it's very easy to take a chance on a book that isn't what you would normally buy.
the second thing is that you have to make yourself write something everyday, even if its just a few words. It helps you to make it a routine in your mind and the words will follow. They do that sometimes....words seem to be attracted to routines like my dad's "gold" tie clips were attracted to magnets.
heads up pencils down.....or the other way around