I played CS:S a lot and enjoyed it for years. A solid shooter with the typical CS setting, but in all aspects outdated after the release of CS:GO. I must admit, I have never even missed it since. Therefore, I recommend to choose CS:GO over CS:S, as it is the better Counter-Strike after all. Thanks for all the good times and farewell.

tl;dr:

The game itself is fun to play, but go for CS2 if you have to choose a CS to start with.