Here is the pattern I made to make my Among us plush!! Its really simple and anyone can make this easily! I used an old T-Shirt for the fabric and white pleather for the visor. To attach the feet/backpack I just took a hand needle and sewed them together!
If you wanted to make it smaller you could still use the size dimensions and just lower them all collectively by however amount you need!
If you have any questions let me know!