Don't let this be intimidating to you - instead of asking yourself "how come I don't know this?" ask yourself "how can I learn more about this?". This might sound cheesy and simplified but it's as simple as "nobody was born knowing this". I'm 31 and I wish I had the money to go back in education and learn all of this with the official way but for now I'm just picking resources on the web and who knows? It just might happen...
Enough about me. If you want it, go get it. Period.
Enough about me. If you want it, go get it. Period.