Search "Blender to POF" in the Wiki.
That should help you for now.
A word of advise though:
Don't make the same mistakes I did, to start make a simple model... like a cube or something like that, few faces, then texture it, and try to add turrets or subsystems.
Hell you can even play around with the mirror property, smoothing and all that stuff.
Then after you've played around with that you would be ready to make a model.
About importing the model to the game, note that you'll need a table for it to load, the POF file contains almost all data regarding subsystems, textures, turrets, etc so for the table you can use a simple cargo containter table entry, just to make the model appear ingame, then proceed.
If you have any questions, come back here... there's always someone around.