Just reading some and looking for things I would or wouldn't do. I applaud you for doing your homework before jumping in. You wouldn't believe how many people just stick the seed in dirt and then try to learn.
Ditch that PH mixer test (you see how hard it is to judge). Get a pen for $15 on amazon. Learning PH accuracy is imperative for a grow that feels effortless.
I'm an amateur with just a few more grows than you, and I buy FFOF soil and their 3 main nutes. It works every time... Stay as minimal as possible on additives, don't be fooled by the clever marketing. With my setup I don't add any nutes until the very end of veg. I like to have my PH up/down solution and some CalMag on hand. I can't say I do this right, but I'll feed them every other watering (feed, water, feed, water,...). So I'll feed one day and then 3-4 days later PH'd water only, per week.
All those tiny new buds near the base of your stem, pick them off. They won't amount to much and they are taking energy from your bigger bud sites. They just never get good lighting.
Your training looks good now. Maybe a little excessive in the beginning and may have slowed your growth. Next grow I would just low stress training a quad. A quad will be 4 main branches (similar to how you have only two mains).
You're doing good. Now fight the urge to mess with them every day.
