First Grow Pineapple Express Autoflower

Hello everyone! This is my first grow and someone gave me a week old Pineapple Express seedling to get me started. She is now 11 days old. My 5 gal grow bags and FF Ocean soil just came in so I am about to transplant her right now. I have her in a 5x5x6.5 tent with Spider Farmer SF4000, AC Infinity 8in exhaust with a carbon filter and a couple clip on fans. I have another Infinity fan on the way with the temp/hum stat. Also have FF trio nutrient pack on the way as well as ph up and down, co2 bag and small humidifier. I’ve been running temp around 77-79 degrees, 18 hours on 6 off. I know next to nothing about growing, especially autoflowers so any advice or guidance would be greatly appreciated. The internet is a vast place of information but I like to hear from seasoned growers themselves who have had similar experiences. I’d really like to know more about the light height and intensity, when to feed nutrients, etc. You know, the good stuff. Thanks in advance, I can’t tell you how happy I am to have found this community