How do i do this exactly?

The Lightwall needs to be touching the wall and placed about shoulder to top of her head height wise. Duck after the wall forms and when you stand up you will clip. You have to be on the side of the Lightwall you want to clip through. For example if clipping to the right it requires you to be right of the center of the Lightwall and vice versa. I would recommend joining the discord as that's where the majority of the strat video/talks are posted.