The second one is also easy. They are not really raids even though they require 8 people. More like story dungeons. Such a mode has not been repeated since because of the issue that newcomers are left behind to watch cutscenes while others clear. Here is a list of raids for both level 50 and 60 if you are interested. Raids are for 8 or 24 people. There is also a mode called trial (= one medium difficulty raid boss, no trash mobs) and they are for 8 people.
I recommend trying the Duty Finder again with the primary language for that data center selected. You could also try asking a few mentors (people with a crown next to their name) on your server to come with you. Most mentors, for what I've seen, take pride in being able to assist newcomers in any way.
