Well women these days don't need a man for money, with obesity raging the 60-70%, being fit at least makes you different, and yes attractive and that can open doors to at least approach.
You should do hobbies for you, fun things outside work, gym can be one of those and a byproduct is what I mentioned above.
If you have interesting hobbies, men today don't have hobbies, they're fixated online, therefore that makes you different, you do those hobbies for your enjoyment but you can take girls on dates, and a byproduct is that you're different from other men.
Learning manly skills like fixing cars and a house is for your benefits, so you don't pay someone to do it, a byproduct is that men today don't know how to those things, therefore that makes you different.
Having a good job can be also good, but women these days can make same or more money than men, that can be beneficial for long term security if that's what you want, but not really for arousal.