Starting X2When you first start the game you will be brief about the release of you from prision by the captain Ban Danna, and how he is willing to give you a chance to work with Terracorp, insted of being in prision. After you have listened to what he has to say you are told to go see Elena Kho at the Terra Corporation's HQ. Ban Danna does give you an free Argon Discoverer (M5). You now have some choices in the game, either go see Elena Kho at Home of Light or go off and try to make some money of your own.
Id say at the moment you should follow the story line for an bit. Doing the first job for Terracorp will reward you with around 20,000 credits - nice, but still you need more. The next job from Terracorp will make you travel a few sectors, for this your reward is is only a ship worth about 5,000 credits.
If you do the mission with returning the Boron to Terracorp HQ, before you return to Terracorp and just after the 'battle', sell the 25 MW shields at an local equipment dock for 370,592 credits. With the 370,592 credits, you can now start to get some real money. You have a couple of choices now such as getting an TS ship and trading, get an TS ship and mining, capture ships or carry on with the story. Personally I recommend either trading or trying to capture - depending how experienced you are with the game.