Good morning Fingers! Don't worry about that lil one falling over,..it happens when theyre brand new like that. Just give them a bit of help for a couple weeks standing up...they will be fine. Please remember to let those pots get 'light' and dry out before watering them OK...Don't worry about the roots...they will search out the moisture in the pots and get stronger because of it OK!!
Also ,your light cycle....ditch it! right now !! Switch it to 16/8. Forget about 18/6 or 24 hrs. like you have now. My new crop is as yours...tiny lil things ..they are on 16/8 in one gal. pots that were drenched at planting and will be fine for at least two weeks , prolly longer ok. DO NOT water them until the pots are dry . Hope this helps ya ...cheers eh!