Upon entering Kamoshidaman, you'll find yourself in the 'Hero's Beginning' area. Your immediate goal is to explore the floor and reach the stairs to the next level. Start by moving forward and drawing the walls on your map. You'll encounter weak Shadow enemies like 'Bicorne' and 'Pixie'. Use this opportunity to learn the combat system and exploit weaknesses. Bicorne is weak to Ice, while Pixie is weak to Fire. Focus on getting characters into the Boost state to conserve SP.
The first F.O.E. you'll encounter is the 'Golden Hand'. These enemies are non-aggressive but will flee after a few turns. Prioritize defeating them for valuable experience. Later, you'll see 'Shadow Kamoshida' F.O.E.s patrolling. These are strong enemies for your current level, so avoid them by observing their patrol routes on your map and moving when their backs are turned or they are far away. There are no complex puzzles on this floor, just straightforward exploration. Collect all treasure chests you find, as they often contain valuable healing items or equipment. Once you've mapped out the majority of the floor and found the stairs, proceed to the next level.