I am creating a mod which modifies the vanilla animations of the player through the player animation api. In addition to this, I am modifying the rendering of the player entity and adding tilt/oscillation depending on the direction of movement of the player. When doing this I have noticed that the Player's head is rendered on the first person screen when using your mod. Therefore I would like to know how I could disable the rendering of the head as long as your mod is active

You can call FirstPersonAPI.isRenderingPlayer() to check rather the player is getting rendered in the first-person context right now. Then hide the head(since it seems to be some custom player model that this mod is unable to work with).

How can I import the mod through Maven I don't know much about it to be honest

https://docs.modrinth.com/docs/tutorials/maven/

If you are moving the player model, you can also look at this example on how to make sure that the head stays attached to the camera https://github.com/tr7zw/FirstPersonModel/blob/1.19.4/Shared/src/main/java/dev/tr7zw/firstperson/modsupport/PlayerAnimatorSupport.java

Thanks for the support