My character is falling throug the floor

Hi okey im realy sorry if this have been brought up so many times.

But i have been scrolling throught the internet for hours now.
I have made a charachter dummy with a asset.

atm i have only managed to fix first person camera, because every time i try to test the game for anything else its just all fall through.

So i am using plane as a ground/floor it is underneeth my charachter so i have tried that.

The plane has Mesh colider and Rigidbody Screenshot - a373b4255bc9ee93de8e9937491f8d54 - Gyazo

My charachter has rigidbody Screenshot - 05bcf51b5bc6c98b135179b2a4031d7c - Gyazo

This is the order of the ground and my chrachter Screenshot - b8105ea4c2ec54f055fc972d9bb4fd77 - Gyazo

I have no idea if this error codes has anything to do with it? Screenshot - 60c4af498af776eb67e30c4c85ac8d22 - Gyazo
Screenshot - 83147978d28f7c6ad74f770598785cf8 - Gyazo
I haven’t delt with it yet was thinking of doing it to the end, probs a bad idea becuase i guess the problem lies there?
please preaty preaty please can anyone help me as soon as possible?
I am realy new to unity started using it like 3 days ago or so.

Thank you guys in advanced <3

Okey i just realised the problem seems to be my error codes.
But im a bit stupid to read them off.
so if anyone knows how to do that would be helpfull