Trim fan leaves?

I'm a new grower with 2 4ft juicy jack plants a week into flowering and three clones that are also a week into flower in a micro grow inside of a pc case.

I think I'm doing good so far but the fan leaves are starting to get in the way. Can I trim them and how many should I leave?

inside a pc case? dope man. In my opinion cut the ones right at the bottom, where they don't receive any light. Later when the buds form it's a nice idea to let the light get to them. But read more about defoliation before. Important thing, do it gradually.

How do they look? First time... they are stretchy but I've been tieing them down they are 15 days into flower.

Healthy! Congrats.