My advice would be to start with a character's reflection about his life, belonging etc... BUT, DO NOT explicitly mention belonging!!
Think about how you as a character would feel in a certain situation. Now, pour all your emotions onto the paper.
If you are really stuck, then adapt the 'Stream of consciouness' style writing.
So, write whatever comes to your mind even it is does not make sense. Eventually, ideas will start flowing out.
Worked for me, and now I have my belonging creative