In the world map, there is a place where there are no pine trees, front at the entrance of the wall. If you click there, it will take you to the forest.
JAJAJAJAJ, don't worry. The battles are still not fully implemented and may have some bugs. For now, the attack, recover, and defend moves are the ones that work, and you should be able to select those. The grab move hasn't been implemented yet.
It's necessary to have a monster selected to perform an attack. However, recovery and defense apply to the character that attacked. Recovering allows you to recover the stamina points lost when attacking, and defending reduces the damage of the next hit received. At the moment there is no feedback (animation or visual element) to let you know what has happened. This is something I will work on in future updates to improve the combat feeling.