With few exceptions, pretty much everything in the game is bought from other players. The link that Kendall posted above is for a site that functions kind of like the Ebay of the game. It's a marketplace where players can post listings for items being bought/sold. It would be a smart idea to create an account there eventually because most players use it to do their trading.
If you are brand new though, chances are you can't afford any decent ship right now. I would look into joining a faction so that you can get yourself a steady paycheck. I'll send you a DM.