doesn't look bad... if it continues to curl down could be a bit too much light -- use internode length to help confirm such things. (distance developing between growth nodes = internode). Over fertilization can cause clawing of leaves, but seedlings should be relatively flat as opposed to praying.
might be a bit hot with soil/fertiizer.. seeds don't need much for roughly 2 weeks. it can handle some unnecessary fertilization, but not excess amounts with such a small root system and limited foliage.
you are in soil and i see you are fertilizing after 1 week if not mistaken... i'd slow down a bit if that was the case. this is like riding a bike.. .you'll learn to ramp up concnentration of your feed as the plant matures and your soil is depleted of whatever nutes that came with it... you paid for it, so use it up before adding a bunch more through fertilization. seedlings don't need anything for 14 days or more.. can watch cotyledons for hints of paling to cue the start of your ramp up of fertilization.
every other irrigation? every third? doesn't matter too much... it wil impact the concentration you give, of course. the more ondemand it is, the more effective it will be, but sometimes convenience is a big part of the choice too.... regardless, you'll have to slowly give more as teh soil's nutrients are depleted.
always ensure entire pot gets wet... you don't need the 10-15% runoff a soilless grower wants, but you want "some" runoff to be sure there are no dry pockets. re-occurrring dry pockets have potential to cause buildup of salts... what dries up is left behind as a solid, which plant cannot use, but you add more water with more ferts in it, and the solids then dissolve increasing concentration in that area of substrate... rinse and repeat a few times and it can get unhealthy for a plant.
multiple factors constantly changing and relative to each other... its a fucking mess to figure out... the more systematic you are learning to start, the faster you progress on the curve.
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