New Technology!!

So I found a bunch of things I wrote in 1962 and 1968.  They were actually dated.  I decided to scan them to my computer and I did it in PDF format but with no security.  Once they were scanned I needed to move them around because they were on onion skin paper and I used the auto feed to scan them.  Thus, some stuck together.  I sorted them and scanned some again but had to use a different file.  Now I have ended up with 4 different PDF files but I am unable to copy and consolidate them into one file because I just don't know enough.  I have copied some pages from "help", concerning PDF files and right clicking to copy, etc, but once I copy I cannot paste.  Right now I am very frustrated.  I am telling you all about this because firstly, I know I will eventually figure it out, and secondly, so you realize how hard it is for someone who is almost 70 to do something new on the printer and computer when she has had no advance training.
It was also very difficult to set up a new Kindle fire and a new Nikon camera.  I spend 23 hours(I really did keep track) to figure out how to set up the Kindle Fire I received for Christmas.  The user manual is on line but you have to be able to turn the damn thing on and add security before you go online or you leave yourself vulnerable.  My Viper security came with few instructions as well. I cried with frustration several times and Srini was ready to send the damn thing back-then Eureka, I experienced success.  The Nikon only took 2 hours but it had a little manual.  I have not yet tried to put my pictures on the computer.  I fully expect more grief. 
It should not be this difficult.  These things are supposed to be intuitive, but I guess only to the young.  I was not taught to think technically and I spend more time learning these things than I do using them.  On the other hand it may help to delay the onset of Alzheimer's disease.  I just finished the book "Super Brain" by a Neurologist  Rudolph E. Tanzi,  and Deepak Chopra.  I have never liked Chopra but I love Tanzi and it is mostly him and his knowledge of the physical brain and the user.  It is all about the brain and its 3 parts and the self who uses the brain.  It is fascinating and I would highly recommend it.  The interesting thing is Tanzi has spend the majority of his career researching Alzheimer's.  Tanzi has also given a lecture on PBS which I watched and saved.
To make a long story short, as I want to continue to live and grow in this new century, I must continue to at least learn the rudiments of the technology.  After all in my hay day I could operate a hi fidelity turntable and a tape recorder and even a black and white TV with no remote control and only 3 channels.  This new stuff should be duck soup.  Or is this the wrong saying for a vegetarian.  I should say vegetable bullion.
So tomorrow I will try again but I need some Excedrin right now.