From a previous thread I had found this site:
https://ideas4diy.com/diy-memory-bea...h-instructions
If you've never made any dolls/stuffed animals, like any other project, I stress making a practice piece first before going into precious mementos. It's been so long since I've done any tight curved seams anyway... You might also consider sock monkey type projects from the sleeves.
It's a lovely thing you are doing, best of luck for your project.