The comments were very useful
I never assumed that programming in any language can be learned in 21 days or in 24 hours ( yes, I seen a book with this tittle
).
But I'm not new to programming, 5-6 years ago i programmed a lot in visual basic, but since than i didn't coded much.
I really liked Teach the Yourself Programming in Ten Years article
It reminded me that learning play the guitar took me about 6-7 years.
I always loved practicing and a always want to be better in it
So i know the basics of C, but i don't know what's next, I mean I practiced a lot with math, string, loops, etc... I can't imagine what else could i do with this.
I want to practice (start learning) the things that I'm really interested in.