Welcome. I’m an old guy as well. But have been actively improving my system for fifty years.
Choosing the right speakers is non-trivial. But from what you have said, my first impression is definitively B&W speakers driven by MacIntosh electronics. The combination supports driving sound and bass that hits you in the chest. Spend as much as you can. But go to a dealer and listen.
The best way to get on track is a book by Robert Harley: The complete guide to high end audio. This explains the principles and language used. This would then allow you to read Stereophile, The Absolute Sound, and HiFi+ articles and interpret what they mean. It is hard to get much meaningful info from here without an extensive history with high end audio.
Whether you want a short cut or want to learn deeply about the subject, you must hear some of these products. Take three different $10K speakers… they will sound very different. They will all sound very different again depending on the electronics you use to power them.
But from what you said, B&W speakers and McIntosh electronics if you want a real short cut.