Apply existing animations to other Sims

First and foremost, I apologize for any ignorance about S4S/Blender, literally downloaded them both today.

I've loved the Sims since it first came out, blah blah blah, fascinated at the work people have put in to mod the game and make cc. Have some ideas of my own- curious how difficult it is to apply existing interactions to other Sims.

Like have adults use the activity table, for example. Is that just grabbing the interaction info from a kid Sim and putting it somewhere specific in the teen/adult Sim code? Most of what I want to do right now involves bestowing interactions to other Sims who could not otherwise do them. Nothing wild, like dogs “practice singing” haha. Pretty vanilla stuff.

Thanks in advance!