I suggest making a party for DR in party finder and put in the description "bring essences".
The quality of people who use party finder is higher than the people who queue for it, because people who queue for it are likely to be a new or returning player that does not understand much about the game like essences and does not think of using party finder for anything.
There is also more pressure to not be lazy when you join someone's party that is demanding essences than if you queue into a duty finder party that nobody is the leader of.
I'm not saying there are not raiding FCs, but it's not like WoW where you have to be in a raiding guild to raid. The main "hard" raids (which consist of 8 people) are frequently made up of people from different servers who cannot be in the same FC but are in a discord server together.
There are not very many "hard" large-scale raids like in WoW. All of the 24 player raids are casual content that is puggable by queueing like a dungeon.
This post is talking about DR normal (which is a puggable 24 player raid). The only one which is meant to be hard is one that was released this expansion which is the savage version of DR and that can have up to 48 players. These are usually done through large discord servers that organise 48 people to do them rather than through an FC (so if you are interested you can look at joining the discord for it).
The only other one that is meant to be hard is from the previous expansion and it's not that it's hard, it's that the consequences of making a mistake can leave you dead or cause everyone to be ejected from the raid and that there is not a queue mechanism to make it easy to pug.