So you're motivated by proving people wrong? Awesome, IMO that's one of the best things to have as, without it, you don't really have competition. I think competition is really important to be able to make real money online, and proving people wrong is basically competing against them.
What I'm saying is, don't jump in at the deep end. Learn to swim first, then ease yourself deeper and deeper in the pool. (That's an analogy for 'make sure you know what you're doing before you do it')