The particular direction of the proton's spin doesn't have anything to do with the fact that the proton is subject to the strong force-just how. (It does matter that the proton has spin 1/2, in units of the Planck constant.) Nor does it have anything to with ``left'' or ``right''. The statement about all objects being rotated from left to right is meaningless. Nor does asking about the ``direction of the proton's rotation'' make sense.
It would be useful to first learn quantum mechanics to learn about the properties of spin and then learn quantum chromodynamics in order to learn about the properties of the strong force.
thanks, I know that in quantum mechanics and physics spin 1/2 is only a characteristic property of the particle. But in gauge theory and string theory I think it means some thing.