Wrinkly early leaves

Try goin easy on the watering, those leaves wrinkling and twisting might be a sign of water damage in seedlings! Seedling may also start their growth a little distorted and with irregular growth that eventually corrects itself (due to genetic instability) Other than that just use unfertilized tap water to irrigate until 2nd-3rd sets of leaves begin to grow, that's when you want to start fertilizing with about 1/4-1/5 of the recommended dosage (if using liquid fertilizer), if the tip and margin chlorosis (burn) persist then flush the medium with tap water! Hope this helps! Good luck and happy growing :)