Starting a new grow. and it has been a while.

For 5 days I have had the light going on an 18/6 cycle. I have a 1.5 week seedling in a 1 gallon pot (bagseed for first run test) and the tent is holding under 85 ambient without an exhaust fan ( my fan comes in Tuesday) just on the ability of the ac in the room and insulating factors( the room is covered in fosm). It appears the need for exhaust may be minimal. I have maintained humidity at a 55- 63 percent level and will drop it to a 50 percent avg for full veg. As it is a bagseed, I have no idea what sex it will be, however I will treat it with utmost care..if for nothing else other than a preparatory exercise for my next bruce banner fem seed grow. I am using 2 inkbird remote sensors at canopy level by plant and oit of light by sidewall to get constant data points on humidity/temperature. A third humidity and temp probe are attached yo inkbird controllers that currently control an humidifier/dehumidifier and nothing on the temp as i have no exhaust fan yet. I have a 120 mm fan blowing slightly above the plant. Tbe light is positioned at 21.5 inches. The ac turns on to cool the room to 65 while the light is on and shuts off after to avoid too far a temp drop. When soil feels dry in top 1 inch, I water.

Problems I have run into in the first week.
1st for a trial run SWIM had a bagseed that they planted in a small pot outdoors, it only got light when they could be home and move it around outside. About 1.5 week into seedling SWIM brought over for us to put in tent since light came in.
Using inkbird controllers for humidity and temp. No exhaust fan yet so while light on it has been necessary to leave top 1 foot of tent open to maintain temp around 83-85 canopy level. I thought it may be harder than this so the exhaust likely wont be running much. Anyways onto my mistakes:

I didnt calibrate the inkbird humidity controller to start when i added more hygrometers i noticed a decent difference. The first 4 days i thought i was keeping my humidity near 60 for a seedling, instead it was near 70.

***Always calibrate new sensors and equipment and re-calibrate after each grow.

SWIM had nothing else and was excited so they put in Miracle Gro -Natures Care Organic with water retention soil...could have been worse. I think this medium will work fine for veg for a few weeks without nutrients.
Have been really unsure whether i was watering the correct amount..in a decent size pot with a small seedling was worried about overwater. But the seedling exploded. It only had the cotyledon leaves and 1 set of true leaves 5 days ago when we brought into tent.
The leaves are tacoing a bit and I feel that may be due to the temps too high to start. Light is about 20 inches away. Raising light slightly and correctly calibrating my sensors I hope will resolve this issue. It should be much less painful when my fan comes in today and can be utilized by the inkbird controller.

I bought a small humidifier and de-humidifier thinking of the small grow tent. In my case since I have a closed loop system AC in the room it is constantly de-humidifying the room as well. So my ambient room humidity is around 34 percent. Soon I will replace this small dehumidifier with a large humidifier (already have a dehumidifier if I need it), because I am tired of refilling it twice daily.

*** Need to always buy way bigger than spec to artificially maintain environments with ease. Otherwise it's too much trouble.

On a side note, I have been using Inkbird remote sensors which can be found here and have been quite happy with them. They provided 7k datapoints just from July 1st to current today on the 6th. The files are easily exportable on your phone to CSV, and with a wifi gateway you can access the information from anywhere (I urge you to tightly lock down access to any IOT type devices and use your firewall judiciously at your house, make passwords to IOT devices random and complicated, in this case the only internet device is really the wifi gateway but still always use caution.)