I was told my lifters are sticking and was told.

I was told my lifters are sticking and was told to buy Sea Foam Auto Marine Fleet. I bought some but it doesn't really tell you how and where to add it. I was told to put 1/2 bottle (473 ml) in my oil crankcase and 1/2 in my gas. I was also told to only put it in my gas. I was also told get an oil change done first and then add it in. I am not sure who to listen to. Also, I was told to make sure the car is warm when I decide to put it in so it can mix and flow good with the oil. Once I know what to do, should I drive the vehicle after I add it in and if so, how long. Thank you