Building for Quest nor working in many ways

Hello, i'm trying to start developing for quest, i have my quest set up with dev mode and everything, and i'm on unity 2019.2 with OVR installed and enabled in player settings. i'm trying to build the sample scenes  via the OVRBuild thing in the oculus menu but i;m encountering various problem that i can't seem to solve
first of all i tried building the locomotion scene, it kinda works but i can't see my hands or controller in the game, and teleporting doesn't seem to work at all, the only thing that seems to work properly is free joystick movement, same applies with the avatargrabber scene, i can't see my hands, however here the grabbing seems to work even if my hand is invisible, i've also tried building all the sample scenes, with "startingscene" first, however when selecting a new scene, from the startingscene menu, i get the loading screen and then the app crashes.
the only scene whwre i can see my hands is the customhands one, but i still feel that something isn't working.
I've looked up on the internet and tried some fix, such as modifying the android manifest and double checking the settings, but nothing seem to work.