Fortunately FFXI's worry-free job-change system allows new players to sign up at any time and still find groups to party with. A party at the local newbie zone might have a fresh from installation Xbox 360 newb, an experienced player levelling a mule, a player levelling a second or third job to 75 a couple players levelling their subjobs - all exp'ing together. That's not to say invites are always fast, as there can be lots of competition for a particular job spot, but there will always be enough players in any given level range to make progress.