Mallet Town

Mallet Town is the starter town of the game, you appear on it after pick up your gender and name.

Go down the stairs, go out, and go to Oak Laboratory (Located in the North-East part of the town)

After you get in, you will be able to pick up one of the three starter Pokemon.

Dr. Oak will give you the pokedex.

Then, Gary will come in, and he will pick up a Pokemon too.

That's all. Go to the North and you will arrive Route 1