For a basic mechanical(hardware/firmware)understanding of computers,look for A+ tutorials and things along those lines.If you want programming languages and stuff,just do a search for whatever language you're interested,and look for a link like(C++ for newbies)or sometyhing along those lines that is focused on the basics of programming itself as well as the language,and you should have a much easier time learning than starting out in a tutorial designed for people that already have a basic knowledge of programming.There are tons of sites with tons of tutorials(this one included).All you have to do is look.