Bob, most all air conditioners that I've ever seen have a cover easily removed to access the control box. Inside that box will be one or two capacitors. The compressor has a larger capacitor (35 to 40 uF) and the condenser coil fan motor has another smaller value capacitor (normally 5 uF). You will either have two caps or a dual capacitor. My system has a dual (45/5 uF). You have to be very careful to see how the old capacitor(s) is/are installed and install the new one(s) exactly the same. If you have individual capacitors, then that is much easier. If you get the wrong connections on the dual capacitors, you'll have a mess on your hands.
So, you need to know the type and value of the capacitors so you can order them from Amazon or on eBay. Check your system to see what is needed. If you can't figure it out, then you need to let somebody else do it. Whatever you do, always pull your disconnect or circuit breaker before working on the innards of your system. As with anything, there are better types of capacitors. If you can get one made in the USA, I'd buy that one.