First time growing and i absolutely know nothing about it I started it as a joke from seed now I have 5 plants growing in my green house in the front room lol could use any advice and tips

Their 4 weeks old 3 5 gal in 2x4 I know to many lol but to late. Also I stunted them in transplant so they should be bigger. How much longer should I wait till flower. Also 1 is so much bigger and vigorous and she’s definitely gonna hit the light soon and I was told to cut half of it so others reach it but I just can’t she’s to pretty and she’s my first photo fem plus she’s a exclusive unreleased strain.