When I first started down the journey of making my own stickers I did it out of a necessity of trying to make creating layouts easier. I watched a few youtube videos to get the hang of it and figure out what I products I might need.
If you have access to sticker paper and a printer you are pretty much good to go.
Especially if you have access to a free educator Canva account.
These are some stickers I made for my book journal, I have some for fiction or nonfiction. And things to use for rating.