I was the same age as you a few years ago when I first started dating (after a long marriage).
I avoided Tinder knowing very little about OLD but assuming that it was mainly a hook-up site, just for ONS and young people (?).
I used PofF as it was free, but also paid to join Match - thinking if men are paying to join then they are serious about wanting a relationship not just sex. That didn’t turn out to be true, they are all the same whichever site they’re on!
Couple of years later I tried Bumble and Tinder. I would say that all 4 sites that I’ve been on are very similar.
Some good guys genuinely wanting a partner, and many more with their hands down their trousers and either wanting just casual fling (no judgement here, I just think they should be honest about it) and some who just want to chat or message for ages and don’t ever want to meet.
I agree with the PP that a lot will depend on where you live, and how far you are prepared to travel. And you will definitely be more successful in an urban/city environment rather than rural.
I would say, don’t discount Tinder as it is the largest and most well-known so it has more men signed up to choose from. Just think of it as an introduction.
Also be prepared to be thick-skinned. OLD is not for the faint of heart.
Good luck!