hi buddy ! welcome here 👋....
as i dont know your auto's knowledge i wil give you some basics on it.
Autos, due to their short cycle are really sensitive to all changes....
that's why normally an auto have to be planted in the final pot....
to accelerate the roots growth it is recommended to cut your light soil with around 30%/40% or a bit more with coco
for the veg time.....if you plan to feed them go very precautiously with N bcause it could more counterproductive and can stop the growth....same at the beginning of the flow.....in mid flowering u can push to mid/high nutes/pk
as usual i recomment uses of benficial funis and bacterias as a bio fertilizer (u can look here how their symbiosis works
growdiaries.com/diaries/28932-let-mother-nature-do-the-job-1st-part/week/140117)
for sure it depending of auto's pheno but that s the basics if you want something not bad at the end...
hope this help ! and good luck for your grow 👍