Simply get to grips and take lots of images with a note book to hand so that you know what you did for comparison.
Assuming it all goes - just learn it.
From you what you imply you are not exactly a novice snapper.
Thinking back 40 year or so I belonged to a Camera Club where the membership seemed to be in 2 parts.
There were those that loved photography- taking and comparing photos and processing and all that.
The other part were those that just loved Kit
they would get in a huddle and discuss the merits of their latest acquisition- I don't recall seeing many photo's from that lot