Upon arriving in Hisui, you'll be introduced to Professor Laventon and the three starter Pokémon: Rowlet, Cyndaquil, and Oshawott. Choose wisely, as this Pokémon will be your first companion. You'll then be guided to Jubilife Village, the central hub of your operations. Pay attention to the tutorials as they introduce core mechanics like catching Pokémon and crafting.
Your initial tasks will involve joining the Galaxy Expedition Team and proving your worth by completing your first research tasks. Don't be afraid to explore the immediate surroundings of Jubilife Village to gather resources and catch early-game Pokémon.