I like what you did with this, nice job.
At 79 I feel your pain. I like doing low angle shots and macros of flowers and insects close to the ground.
I don't understand the acronyms either but there is a free video editor call Openshot that seems to be pretty good.
I would put this in the buy-sell forum even though you are not, strictly speaking, selling it.
Miles and miles of miles and miles :)
There should be a list of compatible GPU on the Adobe web site.