tiny ground plane created by 3d camera tracker

Hi all,

I'm new to fusion, trying to understand why the camera tracker keeps creating a tiny ground plane and messing up perspectives. As all tutorials have told me to do, I've set origin and orientation before exporting the tracking data. I'm on resolve studio 18.1. Screenshot attached!

Also as a side-note, I can only move around 3d space with the middle mouse button, left click to change perspective does not work, it only draws a selection box.

How well did the track go? What was your user error? There is also a scale option and in the ground plane section there's a way to set the size of the ground plane. So there are a couple of ways of dealing with what you're describing, but it mostly looks like you're starting out with a wrong track and you'll have to deal with that first.