Some girls are ahead in this area and find it comfortable to date, as they are ready for intimacy.
If you aren't it's okay. As Mr. Right will wait for you. Mr. Wrong will often "push" you or "pull" away from you. Remember it's you who sets the ground rules. Go slow. Guys often love a challenge and love to pursue. In this process, you can become more familiar with the guy. Talking on phone first helps to see how "the flow" is going. Find common interests and learn about the other person's interests. Perhaps even loosening you up, as well. Take your time, what's the rush? Rushing is the one thing that makes most things dissolve. Overcalling, being too excited, over pleasing, becoming a yes man & forgetting yourself are all no, no's in dating.
Rule of thumb: If you are getting tingles, if you find yourself checking phone for calls, heart racing, enthusiasm, fantasizing about perfect date, then you are probably on right track with guy. But guy must also be experiencing some of these things, too. You don't want it to be one sided which often leads to huge disappointment.
If you still find yourself fearful of dating then try classes, church, out door sports groups, take up hobby, start dinner parties with friends (with rule everyone invites someone new each week) & therapy. In general must become more active and social. People meet people through other people & friends. Also, when it's the "right" person everything clicks and dating is almost effortless. You know when it's right. You just do. That's probably why in weddings they say, "I do.".