[Discussion] TCG strategies

My name is Nikki. I want to participate in the Pokémon TCG tournament that is being held at Dungeons and Dining in Danville, Virginia next Saturday. I wonder, what if I created a deck that can be strong in both attack and defense, and be able to do hard counters against an opponent? The style is Standard, so I need cards from the new Paldea Evolved set, as well as a V-Star Pokémon that can deliver a decisive blow. Any options or ideas?