Looks like you are off to a great start to me. I overwatered my first few plants too. Catch it early on, like you did, and everything should be fine. I’m growing autos also and have been giving nutes at half strength once per week. Mid week waterings are water only. Good luck and have fun! 👍🌱
First grows are scary, but exciting! Luckily, you're doing VERY well! Very happy plants! Liked and followed!
Don't worry about their time estimate, it seems to be the absolute best estimate for the best, most powerful lights. I haven't had any brands of auto -- most of which claiming like 9 weeks or something, in less than 14-16.
I do train, but at the same time most auto diaries I see are longer as well. It fits with how photoperiod strains' flowering periods are advertised as super short as well.
If you have any questions, let us know =)