If you connect a mouse and try to move it it glitches and you are stuck looking to the ground
You can play with keyboard but with mouse it’s doesn’t have cursor lock to play I mean in lol I have to click again to do a skill . You need to click 2 times cause no cursor lock like on PC.
Click 2 times one to go there and see the cursor(the PC).
What came are you having issues with?
Trying disabling gamer mouse mode in the settings and hit F12.
You should be able to move without any issues.