I can't see your profile but yes, not sending first messages makes things much harder for you male or female. The biggest thing is to accept you WILL be rejected. A lot. Most of it has nothing to do with you (for example, you might look like an ex, they are having a bad day, they project their flaws onto you) but if you don't message you won't get anywhere. If you just want to sit around the house, SAY IT! One thing that annoyed me about online dating (especially that site) is that nearly everyone is a carbon copy of each other.
Of course, I think that site is a complete waste of time but I digress. Just don't take it too seriously and realize most people on dating sites are flaky and ambivalent about being in a relationship.