I don't know how old you are, but here's how I started off one of my teenagers:
(Note: I don't think Adsense is the way to make the most money, but IMHO it is one of the easiest ways to make SOME money and get some gratification)
Put up a blog about something that interests you. Of course, I prefer self-hosted wordpress, but a blogger blog will work in a pinch.
Make a dozen posts. You can write about stuff you tried that did not work, some resources you found helpful, what a bunch of jerks people on forums are, etc.
A good subject for you might be your frustrations with internet marketing.
Some free research on keywords might be a good idea. You can use that to help you craft titles and other onsite SEO stuff.
Stick on Adsense (just for quick gratification).
Submit your feed to a bunch of feed directories, write a few keyword targetted articles, do social bookmarking, do forum posting with a sig, etc. I also suggest feedburner, technorati, and a couple of other blog resources you may find.
Try to do one thing every day (or at least 3x a week), even if its just for 30 minutes to an hour - i.e. get backlinks, write a post, etc. GIVE IT A MONTH, and you should have some regular money coming in.
Look at your stats, see what's working, and then build on that.
My (teenage) kid's learning a programming language for fun and just made a blog with some sample scripts, free resources, etc., and makes a few bucks a day while working on it a couple of times a month. And he never does any keyword research...just writes about what he's working on....and somebody's bound to be searching for it.....
We all agree it beats flipping burgers when you're a student with a busy schedule and outside activities.
Of course, MOM steps in once in awhile to tweak it and handles the backlink submissions. He's not old enough for his own Adsense account (I guess), so I just set up a campaign to track it.
