In just had a glance at the free trial limitations, and it would certainly seem you're rather restricted in regards to social features. The biggest limitation is that you aren't aloud to join a Free Company (guild), which would normally be the primary way you meet other players. When you get the full version, it shouldn't take you long to find an FC. There's always plenty of them looking for new members ^^
On a side note, you'll get a lot of chances to play with others in dungeons/trials/raids, but you don't start unlocking them until you're level 15.








