the best way to do this is to just ask questions actually. for example "i'm building a PC for the first time, what processor should i get?" -- or you can be even less specific and ask "where should i start". i've noticed that people are generally willing to give out information about building PC's, unlike some other things.
thank you though, you have inspired me to write an all-inclusive guide on building a computer heh. i will link you when i'm done with it.