It's quite straightforward, have all your villies on food until you age up.
Just after you hit the age up button you switch all to wood.
Once you have enough wood for a barracks and a house, switch them back to food and have a few on gold.
The instant you hit age II, you build your barracks, send the 5 jannissary card (which means that you'd better not have sent your 2nd shipment before you enter age II) and queue up some jannies.
Your initial attack force should be at elast 8 jannies.
The trick is to focus completely on one thing at a time and chucknig out those troops quickly. You don't spend anything on upgrades. You don't build any economic buiildings. Hell, if you're not going with natives, you don't build TPs either.
Most newbies try to do everything and "rush" at the same time. That is of course, impossible. Most of the time, it's not about being faster or better, its just about staying focused and doing without those shiny little baubles that newbies love so much.