PLEASE HELP ABOUT BUY NEW SHIPS

It´s possible to buy new ships in the game? if it is possible, HOW? Please HELPPPP!!

It's not possible to buy new ships. You get new ships through the completion of missions. If you're still stuck with the lowly tug, be patient - your time will come.

However, mods like FutureTrader do allow you to buy ships and parts, but I would wait until you have finished your game before venturing into these options as they can at times affect the mission process.