So sorry. I like others are without eloquent words to comfort. You are on a new journey. It can only be taken one day at a time. It will be hard and lonely.
But I am sure your wife would want you to keep moving forward each step each mile.
I am very sorry for your loss. I could not imagine losing my wife. We lost a sister to cancer in September and brother a year before which are huge holes to cope with in our family. Cherish the good times you had together and share your emotions with friends and family.