This is a tricky subject. As a tall active man aged 64 I own my own woodland and work at least two to three times a week for 5 to 6 hours each time, cutting firewood, planting trees in Winter etc. I use a heavy axe sometimes which I call the heart attack axe. For me there must be compatibility so a lady must be energetic and sporty as well as as a good conversationalist etc. It helps I look younger but a girlfriend 15 years younger is unlikely, perhaps 10 years younger is OK. If the lady is more or less the same age and looks good then good.

But guys need smart clothes and probably clean shaven appearance to match the ladies.

Try social table tennis clubs, dancing classes or any social activity which you like which allows other people (potential dates) to see you in context. Not sure about the older social groups. I am a U3A member but only go to a class which is interesting but not for finding a date. Good luck.