I just put wiggly lines all over the place bru, that simple, as long as the lines flow after each frame it does not matter

If ur doing affects like this take into account motion and speed. If your doing smth like fire (or an affect that resembles fire) you gotta think about how fire moves when it is attached to something. E.g as you can see when the dude moves the fire sort of trails into the direction its moving from.

How do you make effects like that, did you watch any tutorials? If so could you recommend me some