I am kind of in the same boat. I first put a tank on an breathed underwater when I was about 10 years old or less (late 1960's). Certified OC in the late 1970's.
I gave up logging dives a long time ago. I thought I would start again with CCR, and I sort of have if you count my posts here.
I figure I had above 2,000 dives prior to going CCR. I used to track the hours way back when. I can't say what that would amount to though.