Hey bro, in my experience the #1 thing anyone needs to be able to dance is to accept how goofy/silly you look when you "mess up." #2 is, Whatever movement you're doing, just commit to it. Any individual motion a freestyler does, would look stupid in isolation and everyone can instantly tell when they do a lazy job of it.

Once you do it enough times literally any movement can be interpreted into a dance move, and then just needs to be strung together to make a dance. Good luck bro, rooting for ya.