Ahoy Matees! Welcome to Sea of Thieves!
The below video discusses the best place and fastest way to get this achievement after the shrouded spoils update!
Jerkkhammer has supplied an excellent text guide discussing this achievement so I will not replicate that here (drop him a like!), but the below video is a guide that covers all the Order of Souls related achievements and shows the best area of the game to complete Order of Souls voyages!
I hope you find the video helpful!