If you’re just starting out, focus on upgrading your Citadel to unlock advanced buildings and features for your Castle. Complete quests and challenges to grow your power and be rewarded at the same time.
Once your Citadel reaches level 3, the Rally Point and the four training facilities will become available. Train new troops to send them out into the world to gather resources and hunt monsters.
You can find equipment, materials, weapons, and armor while hunting monsters. Equip your heroes with your newly found weapons and armor to make them even stronger.