To make player’s Character leaning, this called Tilting Character and there are many articles talking about this. You should take a research before asking people on the Forum.
EDIT : If you want the Model, I found this in the Toolbox
first recording sucked (use third party program or use the default one windows gives you)
edit the animation.
in the move forward animation, you tilt the animation forward the way you liked
do the same in move backward animation but in the opposite direction
im not sure how you do it but im pretty sure you can smooth the animation in a way that makes it look like its tilting in the way you want
i think its animation weights but you’d have to check that yourself