First grow ever

On day ten I did my first feeding at half dosage and lowered the lights from 21inches to 18, ladies responded really well. Notice growth by the next morning. On day day twelve I did second feed which went well. Did my third feed on day thirteen, which did not go well, 5 hours after feeding I notice leafs were cured up, I brought the lights up to 21 inches and fixed the problem. Light burn. Day fifteen I tried LST which did not go well since this was my first time doing this. Day 16 ladies where back to normal so I did Fimming and see how that works out for me. Wish me luck.