Awesome! Go One Piece! Next make the Thousand Sunny!

Broski, there's a complete map of the Going Merry in either Volume 2 or Volume 3. I suggest you go out & get a copy, or try looking it up on Google.

Totally get that you're new here, and that you seem to be a new builder, but I've gotta point some stuff out.
Firstly, your version is much too square to be a real ship, much less the Merry. It'd be a much better idea to build everything to a larger scale, so as to properly shape the ship.
Your deck is too small, relative to the living quarters.
There's a lot of other stuff I could go into. Message me if you'd like to hear them.