HI, You'll find so much inspiration at Pillar Box Blue - https://www.pillarboxblue.com/denim-3/. She has posted loads of tutorials on recycling jeans
Pinterest has some good idease for you:
Hello there, Lots of projects on Pinterest!
This website makes fabulous things from old jeans
recycle at a fabric recycling drop off
Create crafts and gifts from old jeans
How can I take old jeans and reupholster my wing back chair?