Not sure what to do

How do you ladies do things to remember your angels? I'm doing a scrapbook to put all my sons photos in but wanting other ideas on what I can do, it's very hard as he's my only child and worried there's a chance I won't be able to have anymore children as I have hypothyroidism which could affect fertility. Just want to keep myself busy and keep my son's memory alive in whatever way I can 👼🏼