Well, for some people, it just takes a while to get promoted to operator. Just ask Alpha about that; he knows how you feel. I don't remember specifically how you act, so I might include something you already do.
First of all, become a known person. Say hey to everybody, and if you really want to, ask how everyone's feeling. Show some emotion, too; nobody can hate on the lively, caring player. Not only that, but (usually) someone gets promoted to operator through voting. A majority of the server's visitors are either players, or operators, so it's great for them to know you and have faith in you.
Next, of course, is helping people. Personally, I say you should give some thorough descriptions.. although, don't be too descriptive, or else the player asking will get even more confused. Here's something really great I thought of: pay attention when a player asks an easy question (e.g. how do I infect humans). If someone asks that, they're more than likely a beginner, so you should use /whois on them just to make sure. With that said, they probably haven't seen the rules if they are new, so you should ask them to check the rules and say that you're willing to help if they have any questions/concerns.
Speaking of helping out people, don't overdo it in general. Sometimes, operators like handling things themselves, so you don't really want to interfere when they're taking care of business.
Oh, and one other thing that applies to EVERYONE: take some time off of trying to hit x amount of rounds survived/brains eaten in order to check for unreachables/pillars/etc. You'll come off as a very diligent person, at least in my opinion. I've seen some of you trustees blatantly ignoring obvious things just to laugh at someone's joke or try and be a runner.
That's all I can think of, really. My apologies if I wasn't of much help, but this is all I can give at the moment. Best of luck!