Plenty of cheap 4x5s in different styles. I'd suggest something like my B&J press camera. You get a fairly full set of front movements. You get sheet film. Lens on lensboards. Ground glass focussing. In other words you learn almost everything you need to know. You won't have rear movements or long bellows. But the things are very cheap . Relatively easy to haul. Once you learn how to open the camera and to open the lens for focussing it's a pretty easy camera to use.
Once you've learn enough to want rear movements,longer bellows or just a new camera you'll have a pretty good idea what's important to you. Then you choose the perfect camera for you. Until you've learned what is and isn't important to you that perfect camera will just be a dream.