But what do you guys aim as a goal? I am quite happy doing better than yesterday. And I am learning every day But, to be frank, I do not understand all statements about tactical or dynamic or strategic play. I do not know what you are talking about. I do the best I can...
While I'm much younger than you, I started playing as an adult, too. I don't expect to ever be a master. But I do try to improve, and measure my improvement by my OTB tournament rating (USCF).
When I was rated 1250, my goal was break 1400. When I was 1400, I wanted to break 1600. When I was 1600, I wanted to break 1800. I never quite got there. Then I took a few years off and came back rusty. Now, I just want to get back to my previous playing strength, and have a rating that proves it.
But at my peak, I was in the 1700s USCF, and I would sometimes beat guys rated in the 1900s. I knew they were better than me, but I could also tell that I was close enough to that level that I was sure I could get there with just a little more improvement.
And really, that's the way of it. As you said, you're happy to be better than yesterday. Improve as much as you can, and just set goals of getting a little better at a time.
I often see posts here and on other chess sites about "What does it take to become a master/grandmaster?" The correct answer is "Who cares?" If you enjoy playing, learning, and improving, then you'll get as far as you can. If not, then you'll give up before you get there. The point is to enjoy the journey.

https://www.chess.com/article/view/am-i-too-old-for-chess
https://www.chess.com/article/view/how-can-older-players-improve