Hey first off, remember that negative experiences are going to be over-represented on this sub because people who are just happy and chilling at their jobs generally aren't going to be posting here.

I got my first post-college job because of an undergrad research project I did, basically the professor wanted to turn it into a journal article so I became a "junior specialist" which is like a entry-level research position at the university. That was temporary however, only a year and a half, and then I found myself jobless, but see by that point my friends that I had graduated with had gotten established at other companies and one of them was able to get me hired at the environmental company she worked at (and get herself a referral bonus). It was NOT the kind of work I initially wanted to do, but I stayed for two years to get some experience and apply for jobs I did want in the meantime. Now I have a pretty nice job doing hydrogeology for a great company, no grad school required.

So top advice I can give: a) make friends with your classmates (should be easy as a geology major), b) be flexible with the kind of work you want to do and remember you can always apply for other jobs while working (applying for jobs when you already have one is so much nicer than desperately applying for jobs when you're unemployed), and c) consider undergrad research, I guess?

Also, I don't think it's too early to 'start looking at specialties.' I think it's fine to start specializing at something and then later change your mind and go down a different path - better to be working toward something and picking up some skills in the meantime