We don't need a save game. You are struggling with a few game basics, but once you are up the learning curve, I'm sure you'll enjoy the game
With an unloaded ship, only the evasive move has a function, and since the Indians don't have ships, you won't see any effect.
Enter structure has nothing to do with loading a ship.
See
http://www.ageod.net/agewiki/WIA_Manual#Special_Orders
Endicott with the militia and supply are "too heavy" to load only the Marcelline. Examine the tooltip for the ship, you'll see a line "Transport Capacity 0/10". This means max weight 10 can load, with 0 loaded so far.
Endicott weighs 0, the Militia weighs 4 and the Supply weighs 12, so they won't all fit. Load just Endicott and the militia (<ctrl>-click on those two in unit panel, drag to the Marcelline's tab) while ship is in port. Then move the ship (you should see Ship, Endicott and Militia all together in unit panel)
If you see both WIA and BoA folders, then you have probably tried to apply the Birth of America patch to WIA (aka BoA2). If so, I suggest you completely uninstall, delete the residual game folder, reinstall and be sure you patch with the WIA patch. (link in my signature below)
I also suggest you read through the on-line manual, which has been updated to a more current state:
http://www.ageod.net/agewiki/WIA_Manual