. . . you don’t need a happy ending to move onto a happy beginning.
Write what you know. That should leave you with a lot of free time.
I tell the story to you now, but in each telling the story itself changes a little, changes direction, and that in turn changes you and me. So be very careful not only in how you repeat it but in how you remember it, goslings. More often than you realize it, the world is shaped by two things - stories told and the memories they leave behind.