C&C: Generals

i just got generals and just finished the campaign and im about to play install and play the zero hou campaign and after that im gonna start playing multiplayer but im real noob because i tried one game online with regular generals and we played this map with like 4 square corners and like he was good! he had all 3 corners and i was just like building stuff in my own base and it was gla vs gla and he owned me by massing scorpions

With GLA, you have to expand quickly. Use those tunnels to your advantage.