Were you able to insert control lines and extrude control points?
I have a 30 second tutorial that focuses on these 2 functions:
This ultra short tutorial bypasses setting up a nurbs lathe and converting it to a patch by starting with a downloaded file that contains a single patch.
I have written a good many long tutorials for seamless over the years that soon got outdated by new versions.
In designing Seamless3d 3, my goal has been to make it so that to be able to model a head, you don't need a reference to lots of buttons and functions. I want it to challenge the view 3d modelling is much more complex than using a pencil.
I know from experience young children (1 as young as 3) can use seamless. So long as they have mouse skills, I have had little trouble instructing them to model a head by pointing with my finger where to click and where to drag, using a minimum of words. They don't understand right away what they are doing exactly but by observing what happens when they drag a control point, they can pick up on how they are controlling the shape and how different view orientations gives them control over the shape in 3 dimensions. Likewise by observing how new control lines are inserted and points extruded, they can figure out how a structure well suited for modelling a head can be created.
Learning by doing reduces the problem of words being misunderstood and bypasses getting bogged down learning lots of different concepts just so another concept can be explained.
It may well be that children and adults who don't have preconceived understandings of how things should be done, progress faster with seamless.
Needing a quick reminder which button extrudes and which button is used to insert a control line is like an artist needing a quick reminder where the lead is located in the pencil and which end they must press against the paper to draw a line.
More advanced features may need more explaining but they should not be needed before one is skilled in modelling a head using seamless. My priority over explaining less important features is to debug and complete seamless3d 3 so that anyone can create 3d animated movies with artistic freedom and without needing to have read a book full of documentation.