Edit because the first comment was pointless:
Age doesn't matter. What matters is that you can actually hear what's going on. Use your ears. Don't go by presets that people use because honestly, they probably won't really be the best for your mix/situation. Spend time turning knobs, moving sliders, setting different levels and LISTEN to what it all does. When you learn first hand, you interpret what it does and it will stick with you.
To ask for a general mass accumulation of recording knowledge is asking the equivalent of the history of a nation. You made the right step in getting to this forum, now take every spare minute you have and read every thread on here. I make myself, when I am taking a break from school or writing/mixing/recording to read on here, at least browse different info, even if you aren't familiar with the topic, or it doesn't apply to you. Yah, I'm not having problems with outboard gear right now, but I promise you that I will eventually want to step up to some outboard compressors, etc. You'll learn pretty quickly who knows what they are talking about on here. But I can't stress enough about learning as much as you possibly can. Learn to view mixes in a different way with a different mindset. Learn to appreciate all things having to do with music, as, if they weren't important, they wouldn't exist.
Learn basic electronic principles, so you know why you are plugging something into a preamp as opposed to a line in. (I need to brush up on that :\ )
Yah, so um, get to reading and remember to use your ears.
ps. Have a goal in your mind before you even track scratch tracks. Know the band, know their attitude, know what you want to make them sound like. Even before you record one thing. If you meander your way through tracking you'll end up with the same mediocre sound. Get it right before it even goes in.