I'm a CFAR alumnus looking to learn how to code for the very first time. When I met Luke Muehlhauser, he said that as far as skills go, coding is very good for learning quickly whether one is good at it or not. He said that Less Wrong has some resources for learning and assessing my own natural talent or skill for coding, and he told me to come here to find it.

So, where or what is this resource which will assess my own coding skills with tight feedback loops? Please and thanks.