I would advise you to stay with PCLinuxOS for the time being. Learn it for a while and then move.
It's a goof thing that you want to learn CLI. It can make so many tasks easier.
Sabayon is one distro in which you'd feel really comfortable using CLI, since it's gentoo based.
Sabayon is actually gentoo made simple but to use it effectively, you need to know a little about linux first and you also need to read the basic documents. One of the best places IMO to read up is gentoo handbook and gentoo wiki. Once you read those, doesn't matter how much you've actually understood. You will understand in due course of time.
And '|' isn't used to join the statements, it's a pipe. As, it's name suggests, like a pipeline it transfers something from one command to other. This can explain better *en.wikipedia.org/wiki/Unix_pipe
&& is used to join multiple statements.
Oh and I just realised, the new release of sabayon you're talking about is 3.4 Loop2. It's a beta version. It's not the final 3.4 version. Wait for the final version to release.