Its obvious your judging people because, as you've already stated, your scared of being judged yourself. You need to stop thinking that who ever you may potentially date, will become a long term partner and enjoy the dating scene for a while. I also think your confidence is pretty low, start of slowly and find someone who you have a few common interests with and just enjoy the social side of dating. Then as your confidence builds you will be willing to take more risks and meet new people who you wouldn't normally talk to.
Just start talking to people, you don't have to arrange dates straight away, I never do. That way, when you meet you will have a couple weeks worth of conversations and topics that you've previously discussed to talk about.
Hope you found this useful, I've tried not to use 'text language!'