most current titles are crushing system ram when you only have 8.16gb is becoming standard pretty quickly in 2017. but youll be fine for a bit its a budget build so i doubt you are expecting to max all games anyways
The thing is ram isnt that big of a deal as far as parts go, but if you are having issues procuring 16gb you probably had to compromise on gpu which is the most important part of any gaming pc
You don't need to have what everyone else has, just have what you need/afford. My new build is running on 8gb and mayyyyybe I'll add another down the line but right now, I don't need to.