Namaste Matthew, as Larry suggests above, a full tutorial is needed (even if just for a few hours) on the basics of MSP. But for your job at hand, u should begin with a high-level outline, just as if you were writing a research paper or report. See here for one way of creating this high level structure we call a Work Breakdown Structure: https://www.mpug.com/articles/mind-mapping-your-way-to-better-microsoft-project-plans/
I don’t really know what you are trying to do, but from your short description that outline might look like this:
Harbor Monthly Schedule (Boats 1 to xx) Master Plan
– Subproject 1 / Boat 1
– Subproject 2 / Boat 2
– Subproject x / Boat x
– Major Category of Tasks 1
– Major Category of Tasks 2
– Major Category of Tasks x
– Category x, Task 1
– Category x, Task 2
– Category x, Task x
The above uses a Master Plan / Subproject scenario so you can work on each boat independent of the main plan (or conversely, manipulate / view at all the boat data from one place.
Don’t forget to set a baseline before putting the Harbor plan into play (that will give you variances between planned and actuals):https://www.mpug.com/articles/what-is-a-baseline/
Also, sounds like you will also need to understand how MSP does calendaring, so you can set up a 24 hour (or whatever ) schedule and then enter the work in hours. The default calendar is 40 hours per week, 8 hours per day. If that works, no need to change (just enter work in hours, and not percentages). See https://www.projectplan365.com/2017/09/14/resource-calendaring-the-forgotten-importance-within-project-management/ for a high level overview of what you need to do.
I could go on… but gotta get back to work. Best of luck! Jigs