If you can learn this build order, memorize it, learn to love it, you'll go far.
For noobies I recommend taking a note card and writing these things down and taping it by your computer screen so you can get familiar with it. Then continue playing games with others. Once the build order becomes second nature to you, you can take off the note card and surprise you just went from noob to med!
Once the General build order has been memorized, it can then be modified to use different strategies such as a dark rush, scout rush, spear/skirm, or fast castle, but don't concern yourself with these until you learn the general build order.
General Build Order Starting with 3 villagers and a scout. Make sure to find 8 sheep and 2 boars.
1. First 6 villagers (including start vills) to sheep (7)
2. Next Four villagers to wood (11)
3. Next Send villager to lure a boar (12)
4. Send villager to build mill (13) [no more than 4 villagers on berries]
5. Put incoming villagers on food resources until you reach a population of 19
6. Rest of villagers to wood, feudal when you have 500 food, cancel vill production not to exceed 25.
So your notecard should look like this:
6 sheep
4 wood
food until pop 19
rest to wood
hit feudal
There are other strategies out there, but learn this one first.