Welcome Kool one !
cloning an Auto is not on. They have a fixed life span and that is that. Photo's Yes. Auto's No. No poll needed.
If this is a first grow, keep it simple, leave the fim/topping for the future. Get used to the Auto plant first. As for NPK, just use a veg based feed until they start to flower then switch to a Bloom feed. You don't wanna get to technical if you are a newbie. Trust me, keep it simple and learn as you grow.
And do have fun........................eP.