It's okay. There's not much of a story line in Isle of Armour or new pokemon other than Kubfu/Urshifu and Galarian Slowpoke/Slowbro (Slowking can't be caught until Crown Tundra). A bunch of older pokemon that didn't make it into the main story line can be caught on the island. You can also trade Galarian Form Pokemon with people on the island to get the none Galarian forms. You also have the ability to give your team Gigantamax forms, if they are one of the pokemon that has them, such as your starter.

Most of the new forms and pokemon that were shown in the trailers will be in Crown Tundra, so I'm guessing that's where the bulk of the story line is going to take place.