A good tutorial starts with the basics. Look for a guide that explains the (the red, green, and blue dots that define the shape of your hull) and how to manipulate them in 3D space (pan, zoom, rotate).
After finishing the hull shape, follow the PDF’s hydrostatic section. Place the ship at a design draft. If the is ahead of the Longitudinal Center of Gravity (LCG) by more than 1%, the tutorial will explain how to shift volume (move control points aft) to correct trim. Delftship Tutorial Pdf
To take your learning further, I can provide specific resources to build your library. A good tutorial starts with the basics
To create a sharp corner, select an edge and click the button in the top menu. Place the ship at a design draft
Most tutorials gloss over mouse controls. Remember: