If you have any questions, please let me know in the comments.
Get the project: https://www.unrealengine.com/marketplace/en-US/product/sailing-system
Tutorial contains:
0:00 Migration – Get Sailing System to a New Project
0:50 Setup of Boat
1:49 Boat Customisation
2:42 Preparing Boat Mesh for Buoyancy
4:44 Changing the Mesh in Blueprint
6:21 End
Note: if you want to, you can use the assets in the project, but if you prefer to migrate the package to your project, then the migration part will be useful for you.