Hello LuckyThief86, and welcome to the boards.

It sounds like you have done some homework and that is good.

But I need to point out a few things you have wrong.

The auto-flower plants can grow with 24/0 tho most of the auto seed producer's I've seen (like DJ Shorts) suggest 20/4 as optimual.
You really can't do much as far as trying to get seeds from an autoflower, accept to possible have a male plant and female (and they usually only have feminized) together and hope for the best. Trying to hermie a female auto is not easy but keep in mind your not going to get good bud weight if you are succesfull....no free lunch, make seeds or grow it out correctly. You don't get both.

I've grown autos alongside my mom plants, under 600w MH using Short's lowryderXak47 and the plants grew abt 2' tall and produced abt 1 oz each.
I'd say yes, you are trying to do too much.
Remember that your dissapoint is directly proportinal to your expectations.

Good luck and good growing.
OM:jointsmile: