Skirmish mode is the heart of Age of Mythology's replayability, allowing you to play against AI opponents on various maps and settings. This is an excellent way to practice different mythologies, build orders, and strategies. When starting a skirmish, consider the map type (e.g., land, water, mixed) and choose a mythology that excels in that environment. For example, Norse are strong on land maps with early aggression, while Greeks are balanced, and Egyptians thrive with strong economies.
Focus on a solid build order: rapid Villager production, early scouting, and a timely age-up. Don't neglect economic upgrades. As you advance, build a diverse army composition that counters your opponent's units. For example, if your opponent is building a lot of infantry, counter with archers or cavalry. Practice using hotkeys for efficient unit production and command. Experiment with different Minor God choices to see how they impact your strategy. Skirmish mode is your sandbox for mastering the game before diving into multiplayer.