Matchmaking always attempts to match you up with other new players. If you want to play a Co-op game with other players versus a team of bots, click Play at the top of the screen, then the Co-op vs. AI tab, Classic, Summoner's Rift, Beginner. Then click the "Solo - Match me with teammates" button. If you want to play a guided game with bots on both teams, try Battle Training under the Tutorial tab.
At the top right corner of the minimap, there is a button that looks a little webcam. This locks and unlocks your camera. With the camera locked, the screen will move with you. Playing with a locked camera puts you at a disadvantage. It is highly recommended that you get used to unlocking the camera as soon as possible.