Hey Happy668,
The Neptune is a ship that does take some care and preparation to play correctly. The Neptune does have high sides that are prone to damage but if you setup correctly you can deal out a lot of damage quickly.
The ship does have maneuverability that is somewhat lacking and the concealment is a little high. You do have to take these into account when picking your position on where to setup.
Tips:
1. Pay attention to where you prepare and setup your smoke. While in the smoke make sure you are moving while you shoot because you will get shot at.
2. Do your best to not expose your sides of you can and make sure you use islands and cover appropriately.
3. Play smart, use your BBs to tank and deal out damage.
Good Luck!