I recommend visiting all of them. If you are blessed with a good host class connect, then you might wish to try your hand at hosting. You must familiarize yourself with the hosting interface. Know how to set it up properly. Always be nice, however, do not give in on your rules or principle.
Weakness brings contempt.
The reason newbies should not host is because it requires personal judgment of situations. Only a good experience as a R6 player will make you a good host. The host is essential judge and jury in the game. If you are blessed with a T1, you can maybe handle 12-16. However connects vary, only try for what you can handle.