After effects 3d camera tracking.

3d camera tracking is a nightmare honestly I'm about to give up, when I track there's litterly never any point on to floor to place my plane in many diffrent footage I used, so I have to do a mess to put a plane on the ground and It doesn't work because when I transfer the camera and plane to blender it's always off and it doesn't stick to ground properly, even when changing the focal length and everything. I honestly don't know what to do anymore because I went from tracking from blender to after because it was "better" and I just wasted my money honestly. Also when I transfer my plane and camera it's just always underground on blender even when normalizing the scene after m. Can someone help ?