In your room go to your bed and press a then a house elf named dobby appears. He talks to you for a while then he goes up to the wall and hits his head.
Then dobby tells you that somebody is coming the bars on your window get pulled up then a flying car appears and look who is flying the car it's Ron(ald)!
Ron tells you to get all your school things and get in the car your school things are Hedwig the owl, your suitcase, and one deck of cards you can find your decks of cards at the table closest to the window.
After you are done talk to Ron then you fly all the way to Ron's house follow Ron to his house then Ron's mother comes out and tells you to go inside and get some breakfast.
After you see a screen that tells you it is night time so go into the living room and talk to Ron's dad and go up the stairs and you see another person keep on going up until you are in the attic head back down those stairs and into the room on the right talk to Ron to get some shut-eye.
Next morning you need to go down all the stairs and into the kitchen and Ron's mom tells Ron that the garden needs de-gnoming and you need to help him.
When you are done go to the living room where everybody is and you travel by floo powder to knockturn alley then a cutscene happens you see Draco with his dad.
Then you say you want to get out of here you need to go to the left as far as you can then go down into the narrow path and you see Hagrid then you follow him to diagon alley.
The Weasley family was wondering where you where wound up and then you need to go to gringotts to get money for your school supplies go to the end of the hall and talk to Griphook then you go to the vault but you trip and don't follow Griphook's trail go right this time and go to the far left path and go up and find yourself a big cloud the color blue with yellow sparkles that is the boss the boss does 40 damage so you should get to 4 new levels to beat it and behind the boss is Griphook the vault to the right is yours the vault to the left is Ron's go into the vaults and when you finish Griphook is not there and you need to find the way out.