There’ve been a ton of threads about crockpots/slow cookers on the forum over the year. Hit the Search box and you should be able to find a ton of recipes to check out, even if the threads are 10+ years old, recipes are recipes. This is one of the threads from last year.
My go-to is still just a bunch of loin of pork, sauerkraut, and diced apples.
Mostly trial and error based on how much “stuff” (meat, veg, and liquid) you’re using and how long it’s cooking for. A “quick” slow cooker recipe for 4-6 hours would need a bit less liquid than something cooking overnight for 8-10 hours. You can always use a thickener like cornstarch-in-water before serving (a little goes a long way).
“More than one” is about as specific as you can get with that. Too many variables involved.