At the start of your adventure you wake up here, you are asked to set the clock, daylight saving time and then the screen changes to Professor Oak, he explains about Pokémon then he asks for your name then you appear in your room.
If you want you can look at the Town Map (next to the exit) then go down the stairs, your mum is on the left of the table, walk past her and she will talk to you, tell you that Professor Oak wants to see you then give you the PokéGear. After setting the date she will tell you about the phone, now go outside.
Talk to everyone in the town for useful information then go to the large building to the left of your house (note the redhead to the lab's left). When you are in the lab, go to the top, the professor will make you choose a Pokémon, for the new player cyndaquail is the easiest to pick, followed by Totodile, followed by Chicorita, he gives you his phone number then go out, when you get near the exit his assistant will give you a potion then you can leave.
Go to the West exit to get to Route 29