When you first begin playing the game, you will immediately be prompted to choose how your character will look. There are many customization options within the game proper, so you don't need to worry much about this selection, simply make sure you select the option of the gender and skin color that you desire. You will then be able to pick what name you want for your character.
After you've made these decisions, you're introduced to what seems to be a YouTube-like website, with a video playing. A man comes in to introduce the Galar region, with its beautiful nature and cities. As always, it's explained that Pokémon are essential to human life, living alongside humans in cities and helping humans develop and evolve, and vice-versa. Afterward, the man will introduce Leon, the Champion of the Galar region, who is about to begin his exhibition match against a man he refers to as Raihan. Leon then calls on his Charizard to Dynamax, envelloping the stadium in a bright red light and surprising everyone watching. And thus, it's time to begin your adventure in Pokémon Sword and Shield.