Hi willem,
> I am a digital nitwit, sorry about this, but is this method of changing proportions
> during modeling called 'parametric design'?
Yes, although often times that specific term 'parametric' CAD is more focused on mechanical parts and the parameters are things like hole diameter values and constraints on 2D profile curves. This type of parametric design is not focused on generating forms of an organic nature.
The type of thing you show there is more what's often now called 'Generative Design' in architecture :
https://en.wikipedia.org/wiki/Generative_design although that term 'Parametric Design' is also used for it too.
Generative Design involves a process that is similar to programming, where you work on forming a type of recipe for a model rather than just drawing it directly.
It's not an easy process, there is a significantly high learning curve involved with it. Your shape has to be broken down into many small pieces of logic. So it is something that you'll need to expect to dedicate a lot of time to gain experience in.
> Read a few posting on this subject and it is a feasibility on moI now if I am correct?
Yes, there is a MoI extension called Project Elephant (usually just called the "node editor") developed by Max Smirnov which adds this type of toolset to MoI.
But it's not a built in feature of MoI and isn't MoI's primary focus. It's more of an experimental thing.
> I would have to learn from scratch, from that point of view moI would be a good option
> I think, i my case of digital ignorance?
Probably the Grasshopper toolset in Rhino would be better for you if you have absolutely no prior experience with programming. It has a larger user base and has more information, documentation, tutorials and books about it so there are just more resources available to you to use in the long and intensive learning process that you'll need to undertake.
- Michael