I've been looking for a tutorial for how to make new interactions for the sims 4 and the animations needed for them, but I can't find any. Does anybody know where they are and if so could you please provide a link to it please?

Have you taken a look at the official Maxis custom content tutorial?
http://modthesims.info/showthread.php?t=533094
It doesn't really go that in depth but it does show the (rough) steps on how to add interactions to an existing object. I'm not aware of any other tutorials out there. Best way is to look at existing interaction XML's and find one in the game that is close to what interaction you would like to create and build off of that.
I assume you at least already know how to extract the XML's from the game and have them set up in different folders and so on? I use the Sims 4 Modworkshop (google it) for browsing and cloning as it also lets you see if there are any DATA files out there.
This tutorial: http://modthesims.info/showthread.p...110#post4710110 also helped me.