There are force fields and the like if you want keep air in a open area, like the surface of a barren planet with a bad atmosphere, but our ship will be built more like a submarine, with starboard, port, top, and bottom sails, though there are viewpoints.
The ship will have solar sails, for normal propulsion, tachyon sails, for FTL propulsion (they compress space in front of them and expand it behind by moving tachyons from the front to the back). It will also get
magnetospheric drives later that will work much better, but at the cost of power and making us visible. It will have broadside a swivel cannons, though, but they will be of the rail-gun kind, not the powder kind.
A "Treasure Planet" style ship would be way lopsided and hard to keep straight.