Start with what gets you most jazzed in your life. Find another person who enjoys the same thing. Engage in that activity with this "friend" and see if you are both drawn towards the idea of dating.
And I can still recall twice in my life, the thrill of that moment when I realized my heart was spinning out of control and there was nothing I'd rather do than be with this other beautiful person. Whew! Only twice? Dang, that's inspiration enough.