This is something that many first time auto growers dont think about because everything in most of the literature says that autos dont like many nutrients. Well some do not like alot, some like about average or the same as photos, and some like alot of nutrients. The seed company can help advise you on this, you can look up others grow journals on your strain, or you can go and use trial and error and common sense. There are grow journals online on every strain I've ever seen for sale.
Most autos also do great with lst/fming and Low stress training. Some like to be defoliated more than others. Again look up grow journals, talk to the breeder, or trial and error.
I have not seen a major difference in yields due to pot size on most autos. I have used 3 gallon hard pots. 5,7, and 10 gallon fabric pots and they all were very close to each other in size and yield. Now there are some mega sized autos out there that would greatly benefit from 7 gallons or larger. I think fast buds tangimatic is 1.
This one goes without saying but check your plants everyday preferably twice a day. Things happen. Things go wrong or break etc and you can lose everything including burning your house down if you do not check them everyday.
Anyways I am sure my voice has worn out its welcome. But was trying to pass on a few tips until someone starts doing it too. Then the next person can etc. Lol Pass out tips or what works for you.