Crystal Tower Questions (Hope correct tab, did not see a raid tab)

Newer player here. Level 52 DPS, just discovered that in order to progress in my MSQ I must complete the Crystal Tower quests.

Appears Crystal Tower is a 24-person Raid.

1. Is this really doable by Duty Finder?
Always thought raids were premades, with a lot of learning positions movement, etc.
2. So far, all dungeons including the hard ones I have tried are doable almost on the easy side with maybe two wipes. Is it the same with these low level raids?
Thank you for your response.