GeForce now, and shadow, both let you test your connection to see how good it is. Basically you need a low latency and low jitter internet connection. To the data center.
The maximum latency you want is 40 milliseconds, and you want low jetter. Then you're going to have a good experience. Obviously the lower the latency the better.
Speed.cloudflare.com is a good basic test, it'll tell you what your average latency is to cloudflare, and your jitter is. If that's good then game streaming might work for you.