I am quite a few years older than you and I have long made peace with the fact that I am not going to be a concert pianist, or win an Olympic medal, or score the winning goal in the World Cup or .... That doesn't change the fact that the first thing I do in the morning is go to the piano and murder a couple of Bach preludes (well, maybe not exactly the first thing but pretty close). Or that I still put in total effort and concentration whenever I swing a golf club or get on a sports field or play a game of cards.What I am trying to say is, just keep doing what you love doing and accept it for what it is.Then again, if you still want to achieve your piano goals then I would suggest reading Bounce: The Myth of Talent and the Power of Practice by Matthew Syed. Though it is oriented towards sports I think it applies equally to other disciplines like learning the piano.
I was an absolute beginner at 69. Am now 73. Progress is slow, but I love playing.I hope my teacher (as for age I could be her grandfather) has patience with me.I know I will never be a virtuoso or a teacher, but that doesnot stop me.
Of course progress is slow. What do you expect? At our age things don't go so quickly. As a teenager and twenty something three hour practice sessions were the norm. A performance or two a week was standard.These days I play the pieces I like and slowly learn new ones that I WANT to play. I sit down at the keyboard once a day because I want to hear the music, not to prepare for a lesson or performance. I think of myself as my own classical music station where I control both the playlist and the interpretation.