It is easy to get intimidated by the opposite sex sometimes. It is not uncommon. I believe for many it is the fear of making a connection and suffering rejection (hope followed by loss of hope) that makes it difficult to try.

I agree that sometimes the bar is unrealistically high. On dating sites such expectations are often silly. Sometimes I think people put them out there just to ward off "losers"

I believe that the best approach is to be just who you are. Make peace with your shortcomings and put the most positive aspects of your persona forward. Everyone has something to offer to the right person.

I wish you the best in making the right connection, and do not worry about being intimidated, just be the person you are and realize that dating like sales is a numbers game, you may have to talk to a lot of potentials before you can close the deal so to speak.