So this is exactly how I started and I also started with autos… I did add extra perlite to the FFHF tho.
In case you’re bored and want to see how that went 
^ (forum tip) if you tap the “top replies” button (circled) on a thread you can skip a lot too!
I had some hiccups, moved houses right at the beginning of flower, and they also stretched crazy so I had to supercrop them basically BUT it all worked out.
I changed mediums, nutes, and am growing photos this run so a COMPLETELY different grow but that’s the best part about this “hobby” - so many options and so much to always learn and try.