The next step you'll need to take is choosing between clumping and non-clumping litters. Some cats don't care about how their litter looks. Other cats seem to have a preference toward clumping litter. They just don't want to walk on their dirty, wet litter and will usually find another spot in your house that they would rather use as a bathroom!
Clumping litters are designed so that the urine and feces stick together into a solid pellet. These pellets can be scooped out of your cat's box just like regular litter, but it also makes them easier to clean up messes by hand. You could even use this type of litter outside or inside so whether you have an indoor or outdoor cat, this might be the safer option for you! The downside is that once these litters get wet, they become extremely heavy and hard to pour from the package. This means you'll need to buy more than one bag at a time.
Non-clumping litters are made with materials that absorb moisture and hold it in until you scoop or sift them out. The downside to this type of litter is that the urine evaporates into the air, creating an unpleasant ammonia smell! While it may seem inexpensive, this kind of litter will need to be replaced often. If your cat has very frequent "accidents" (or diarrhea) they can use up a whole package within a week! If you own multiple cats, you might want to consider buying clumping litter instead because it doesn't get saturated as quickly.