First off let me say that you will not succeed at playing snake without on the field practice. There is a 1 in a trillion chance that someone might be good enough to just walk on to the field for the first time and be a pro at playing snake. Practice makes perfect. I have been playing paintball for 5 and a half years now and I am still not that great at snake.
Now for the tips. One great way to get good at the snake is to play it low and tight. There is a good video on how to play snake here:
In this video Mike shows you how to play the snake nice and tight with good snapping tips. Basically for those who cant or don’t want to watch the video, you use an elbow to knee method. You spread your knees as far apart as possible, then you keep your shooting elbow against the knee. This enables you to keep a low profile, and still have good control of your marker. Then, when you crawl you keep that knee to that elbow. In the video, Mike explains how you can snap up, and you can snap sideways easily using this method. Other than that you will just have to go out and play in order to get good at playing snake.