GSC auto (outdoor). Advice accepted

The number one tip I think anybody could give two someone growing their first plant is do not overwater especially when it’s young like that don’t even water it until the leaves start wilting a lil stress can be good I would try giving it like 1-2ml per gallon of water to feed but don’t feed every watering

Also, as noted by @AlextroWeed, pests could be a potential problem.

Assuming you live in a warmer climate, or that this is not a fast strain, you may get some nasty weather that might be great for sensemilla if the plant survives; but it could lead to mold or other problems. As this is an auto, light schedule won't really matter; at what point does flowering begin? The main problem you can run into is too much dampness/wetness during flower, but if you live in a drier climate, or are expecting dry weather in Sept/Oct all you need to do is make sure the soil around it stays damp. You can actually help with this by using river rocks, while leaving 6 inches of open soil around the main stem; the river rocks block the sun from the soil, keeping it damper. Judging by the soil in your pics, it looks like you'll be fine. As for plant food, it's really your choice, but look around and see what other people on here used for that strain (each plant is different). Your biggest issue will be keeping the plants healthy in flower! Cheers! Happy growing (and eventually smoking, etc.)!