I’m a rock guy who has passions and I fall for the hookup a lot and I asked if maybe it would be better if I joined a dating site for one-on-one meetings and then it would limit me and I would sin less.

And what about a Gentile in Athens?

Assuming that it is permitted by the laws of the country, etc., etc.

First of all, it's good that you're asking and trying to overcome it, and it's a legitimate question of course, but in my opinion, I think it's worth consulting with someone who, in addition to understanding this and having both halakhic and general knowledge, also knows you and can give you more appropriate and specific advice.
And that's just my advice - maybe instead of going to these sites, you should go to matchmaking sites, even if it were allowed, in my opinion it's just a waste of time and it detracts from the value of it.
Anyway, good luck.

I don't think so.

Challenger – Try to learn and be wise – No thought of fornication increases except in a heart free from wisdom.
Obviously this is not a clear-cut solution but it probably helps.

The Bible says that the sin of hypocrisy is more serious than that of adultery, but the answer for hypocrisy is easier.

It's easy to say, "Get over it," but married people barely manage to survive two weeks, and I have to survive a little more than two weeks. [Anyway, matchmaking is not an idea because even if I go out now, it will take me at least a year until marriage.]