Input provider not appearing, don't know what to do

I'm currently trying to move to my first 3D project, a first person platformer. The issue is, I can't find a single way to move the camera with the mouse using the Input System. I've watched videos and the solutions are either making a really complicated extension by yourself or using the input provider, which does not appear by default. Something I read was using "Show preview packages" when installing cinemachine to get the latest beta where it should be included, but that does absolutely nothing. I've tried messing around with mouse delta and the camera's transform rotation but nothing seems to work, I'm genuinely stumped. Any help on some kind of getaround or on how to unlock the input provider?