Then when should i give her nutriens , everywhere i check its 7 days. Also its lightmix . Maybe i will give her like 2 more days ( 1 watering))
The seedling itself has enough food for about 2+ weeks (the round leaves) NO nutes. After that they should find food in the soil (hopefully not hot), for about 2-3 more weeks.
Tiny seedlings (for future, not now) do much better in a solo cup, and over-watering in too large a container will drown them fast. (Common) DO NOT TRANSPLANT NOW PLZ!)
Also I would pull that intense light for another few weeks and put in a common CFL daylight bulb, or a T5/T8. These can be placed within a few inches of the tops without damage. I used CFLs myself at first..worked great, but I needed toom many bulbs and switched to this for seedlings.
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Besides the rest, they are heat/light stressed imo.
Wherever you are checking seems like a sketchy source and Google is a better friend.
This forum and Groweedeasy.com are much better sources of correct information. Misconceptions here are usually corrected in a hurry and the new growers put on the right path..if they listen.
Good luck with your grows, present and future.
Edit: Forgot about RH..for vegging plants and seedlings I say 50-60%.