I am ignorant to the ways of the "internets." I'd like to register a couple of domain names and would appreciate some advice please.

Is there anything wrong with registering with GoDaddy or some other service simply find off of a google search? Does registering via a particular source lock you into some sort of commitment of web hosting (and trust me I barely know what that entails) through them or can I register through them and then do whatever else I need to do, whatever that is, elsewhere?

My most basic question for now is, assuming that I want to set up a couple of web based businesses, what is the best way to simply register the domain names?

Less critical now but more so soon, what is the best way to get help with setting up web pages? I realize I could probably figure out a basic one on my own but my job hunting and other commitments are more of a priority at the moment so I at least need to find someone in an advisory capacity.

I'd appreciate any advice that can be offered. I really know nothing about this stuff.