Having a first person player look at the mouse on the y axis

Hi, I use to be able to do this but with the changes to locking the mouse position I am stuck. I want my character to rotate around the y axis and follow the mouse. My scripts have all not worked so I would really appreciate a response or a point in the direction of another question like this one which has been solved.

Thanks!

Good day.

But give us something… If not,m go find one of the dozens of posts about this issue…

Bye.