Hi...I started as a beginner when I was a 40.
There are many videos at the libraries...that
are helpful.
Just go to the library and there is always
a research computer and type in learn to play guitar video..

I was fortunate to find a really good teacher that
gave me a good start though.
I now play everyday...and go to different nursing homes
and churches and play for others.
My really good lady friend is 80 and plays everyday..
and she learned in her sixties..
so its never to late to start to learn to play an instrument.