Can I cut off fan leafs in the flower period, to g...

You can always trim off the worst offenders who are covering up major bud sites which are not getting enough light because of those leaves .. when growing indoors our lights don't penetrate like the sun does so we need even canopy to take advantage of all the light we have at our disposal . I wouldn't go cutting happy just the ones that are really blocking light from sites which really need extra light ... Maby do two one day and then another two a few days later don't want to stress her .. cheers

Try to do as less stress as you can, especially autoflowers. Using LST you can pull fan leaves under without creating cutting them off. You are still early flowering stage. I'd say a 3-4 weeks easy before she is ready.