[jihoon796]

I think the limiting factor for most people is motivation, not intelligence.

Reading books and doing tutorials will certainly help you, but you might get burned out quickly. Working on projects seems like a much better use of your time.

Eventually, you'll have to pick up some books and learn theory, but the main challenge is getting to that point where you'll find the theory useful.

[Lordarminius]

> I think the limiting factor for most people is motivation, not intelligence

I think the limiting factor especially if one is learning on his or her own, is grit and persistence.