I am going to try to put this into words that, without my offending anyone, I hope will express both my gratitude to this community and my outright frustration with myself.
First of all, within the year since I became interested again in Terragen, I have repeatedly sought advice and help via this forum, and have gotten it. For that I am most grateful. I also want to personally thank each and every one of you who have freely shared your vast knowledge of this application. I would have been much further behind had it not been for you all.
Yet still within the past year I know I have made little progress in the direction I want to proceed. For me, Terragen is first what its name implies - "Terra-": "Land" or "Earth" and "-gen" : "create". It's what my ultimate goal is by using it – to virtually create "natural" and / or unusual landforms. But I also know it is much more than that. And when it does, I become lost.
Imagine if you will that you jump into a swimming pool and you cannot swim very well. Immediately you are submerged and are struggling to come up and stay afloat. You jumped into the deep end, you are sure. And then you look around and see everyone around you is waist high in water easily wading around and for them there is no "deep" end.
That's how it is for me. Everyone makes it look easy, and I just do not get most of it. That by no means is any of your faults, or that of the Terragen application, or its developers. It is mine alone. As hard as I may try, even with help I make little or no progress. Maybe it's because I'm not much if any good at mathematics or logic. Both are almost mandatory for one to be able to successfully achieve a "predictable" result which is something I can rarely do.
It's not that I feel like giving up (again). I do find some enjoyment and I somehow know that little by little I will eventually move a millimeter or so along while others easily cover distances of light-years. Again my thanks go out to all who make this forum a valuable source, not just for me but for others who may share my position.