First person character walking through terrain?

I’m entirely new to all things Unity as well as game design so I don’t know why my character is walking through the terrain- raised, lowered, and flat. Also, please be simple and use limited lingo as I have not caught up with all the terms yet. Probably a simple error but I appreciate any help given, thanks.

Not appropriate colliders,

  • check terrain collider
  • Check player collider, if rigidbody applied check if its marked as trigger,
  • (Check collider layers, only if u modified this), the, arr not collider layers but its somewhere on the physics pabel

I figured out my y-coordinates were incorrect on my fpc which is why it seemed like I was walking through the terrain. Like I said… probably a simple error.