When and how do I cut fan leaves

You can trim the big fan leaves that are blocking light to maximize the light penetration on every buds sites but don't trim too much , the goal is to trim enough to let the light get in but not enough to stress the plant. To remove the leaves you can cut with scissors or you can just pluck it away by pulling down the leaves or you can push down the petiols ( leaves stems ) with your thumb. I don't feel like there is a wrong way to LST, there are bad moments to do it ( too late when the stems aren't flexible enough or too early when the plant Is too small to have an efficient LST )