Once you've been out of the dating scene a while, it does take time to get back into it. I say take it slow.
You might want to just start going out more with friends at first. You could also join one of the many meetup groups, or any group that focuses on one of your interests. If you like to volunteer, you could do that. Also, night classes can be a good way to get out. Being out meeting people (including men!) in a low pressure situation will help boost your confidence.
And of course, there's online dating. My advice in this area is to look at it as just another way to meet men. Don't take anything personally (such as when a man does not respond to your email, or does not call you back after your first meeting). I prefer to let the men do the contacting and suggesting a first meeting. The first meeting is not a date, it's just that: a meeting. I could go on and on, but there is a message board specifically for OLD.
Wishing you all the best.