You start off with the games opening sequence, ending in your hut. Walk outside and Saria will run up to your house and want to talk. If you want to, go talk to her. She congratulates you on getting your fairy. See the big area on the right side of your map? That's where you have to go, but Mido is blocking your way. You need a sword and shield to make it past here. Go to the triangular area at the bottom of your map screen, it's the training area. See the little hole in the wall? Go crawl through it. Take a left up here, and you'll find a boulder going round and round. Get behind it and walk with it, and you'll be at the other side. There you will find a chest with a sign in front of it. Open the chest to receive the Kokiri Sword!

Now you'll need 40 rupees to buy the Deku Shield. Look inside tall grass, slice little grass, throw rocks, and look around. Jumping on platforms over water gets 5 rupees, and jumping off the fence near the hole in the training center gets major rupees.

Also, Mido's house contains several chests worth looking into. Once you have the 40 rupees, go to the shop. It's the little building next to the Deku Tree's area. It's striped red on the top, and a Kokiri is sitting on the roof. Go in, and buy the Deku Shield. Equip it, and the sword if you haven't already, and go talk to Mido again. He yells at you some more, but then realizes you've got weapons, so he let's you pass. Of course, I'd suggest talking to everybody beforehand, since they won't say the same thing once you've gotten the Kokiri's Emerald.

Alright, walk to the Deku Tree, and you'll be ambushed by some Deku Baba. They won't attack you, but if you touch them, it hurts. Slice them up, and you'll receive Deku Sticks. Go up to the Deku Tree and a cut-scene will start. It's about Ganondorf's desire for the spiritual stones, and how the Deku Tree is being destroyed from the inside. He opens his mouth and invites you to go in. So what are you waiting for? Go!