Looking to get into Dark Angels with the launch of 11th edition and wanted some clarity on chapter markings.

I’m a big Age of Sigmar collector but recently I’ve been looking at a lot of 40k. I wanted to go for space marines not because they’re really the starter faction that everyone new goes for but because I love the “For the emperor“ deal the all have and just how cool they are in lore, the shows and Space Marine 2. Dark Angels were the chapter I wanted to go for so I would like to get the new launch box and paint them as Dark Angels. However, as an unexperienced 40k and space marine collector I’m rather confused about the shoulder markings they have. If someone could explain them to me and let me know what would go on the shoulder of each unit in the new box I would appreciate that. Thanks for any help.