Changing power steering fluid not depending on mileage. You every time use car, one can imagine how many times u turn your steering within 1.5 years ownership. By right should change now because when new car steering fluid got metal debris. Same car like important 1st EO change. Usually when steering got squek sound then only change. Same case like brake oil, when dirty/ change color then change.

can wait , it will getting darker and darker only . I just changed at 44K KM , u can go outside change the power steering oil or go back SC. Regardless one thing , should check your rear master brake pump which it call rear wheel cylinder it might be leaking or stuck.