4 clones nOOb grow

This look amazing and very pumped. The carbon filter barely contains smell . Any ideas? They look sorta ready to me but i will wait for more tentacles to amber. Not sure when to cut them down I feel like another 20-30 days that’s the problem with being n00b. I am watering every 2-3 days and using nutes once a week. I am worried I can ruin it all now. Any ideas or tips let me know here. I plan to flush in last week (2-3 weeks) sorta thing then cut down and hang for a few days then clip and do round 2 n00b grow with auto flowers.