Hello! I use the deep litter method myself, and it is great! You can use almost anything with DLM (deep litter method). Wood shavings, grass clippings, leaves, pine needles, hay, straw, sand... I'm sure there are many more things out there, too, but these are the most common I've seen here. Simply lay 3-4 inches inside the coop/run every once and a while, and let it acclimate!
To stir it around, I toss a handful of scratch grains, and let my chickens do most of the work. Sometimes I will use a shovel, though, when I don't just want the surface layer stirred up.
My chickens like it tons better than they would regular dirt... it keeps them entertained, if that makes sense. They're always scratching around, searching for new things to gobble up underneath the layers! DLM is also good for the bugs. Depending on how deep you make your litter, insects will come up to the surface to feed off of the nitrogen-rich soil, which has slowly bettered over time. This creates a wonderful snack for your hens, also!
Here is a thread where you can learn lots about DLM:
https://www.backyardchickens.com/t/70/deep-litter-method
It's very long, but worth a read!