@Jarojo:
Mods that are not multiplayer friendly are mods that can't be uninstalled at any time. That means they're mods that add new poses, hair/head/beaks/etc and monster parts.

So that would be "More Idle Poses" to "Obe Monster Parts".

Are there any mods here that aren't multiplayer friendly? (Would crash or bug the game if not everyone has it installed)

@CloseKane:
Scroll to top, just below the description you can see the button "Subscribe to All". This will install all mods in this modpack/collection. Or click the green "+" button on each item to install them individually.

Here, I made a visual guide for you: https://i.imgur.com/OxEXTzu.png

how do i add this to my game?