Is this correct for auto training?

2000ppdf is way to high for indoors unless you have add co2 and most lights don't hit this number unless you paying 1000+ for them. As for autos and photos their growth habits are different. photos you determine when you want to switch it into flower, autos do it on their own and this prevent you from using some HST techniques like topping or mainlining. some autos switch faster others take their time. On top of all this if you stress an auto enough it will go into flower early. Autos also like less intense feeding schedules vs photoperiods and less light intensity for most users. Your plants looks good for a month old in soil grow. You will want to let it stretch up and do its thing now, can use some LST to keep the branches from getting each others way but not as aggressive and pinning the plant to the ground. It will be starting to enter in its flower phase soon so it will like a bit more light if you move it down a bit it should help. could try 20" vs 23" mine are at 15" but they are different lights needs to look at the manufacture suggested hang hits and look for signs its so close/far away. Good Luck!

Vitamin b as a foliar is great for stress relief. Also blue/light has been shown to greatly reduce stress levels within plant cells compared to white. Also try playing some classical music 2 hours per day.

Auto/photo doesn't really change the principals of growth. You can push your plants to around 2000 umol of photons before it starts to curve off hard but thats just light. That given all things are equally rapid you can get 2 + inches per day. But this requires all 9 cardinal rules of plant growth are met in equal proportions. Plants are a complex circuitry of processes if you increase photosynthesis, perspiration will increase as will water intake/uptake, once you start pushing your plants hard the humidity will lol RealPlayer take off which is problematic in a grow space without excess ventilation power. This gets out of hand during flowering. The answer is rhetorical, how fast do you want your plants to grow is the question. If you would like more knowledge o would recommend watching Bruce bugbees videos on YouTube regarding the cardinal rules of growth, high level lecture quality Information on the cardinal rules. Peace ✌️