I joined geekhack back in late 2013, and lurked until January of this year.
Like many of you that are now recently posting, I felt like there was too much knowledge for me to contribute. I felt like the old school dudes would judge me. I didn't think I had a place here, hell I still don't know if I do. I've been in your shoes, and know how it feels.
My advice, just give it a go. I'm a shy person until I get to know people. I fit the description of a geek. Nobody here will crucify you for saying something dumb or silly. There are people that will call you out and criticize you, but they are far and few. I guarantee you if you take part in discussions, and try to make friends, you will. It may not happen immediately but you will find people in your area, or in other countries, that will shoot the **** with you.
I hope this helps at least one person, if that happens then my post worked. We are all in this hobby for the same reason.
Also, never hesitate to shoot me a PM. I may not respond immediately, but I'll reply sooner or later.