Most of them look pretty good, the closest to the left is a little sad looking and with how thin the stem is it may be dampening off. Your lights off temps are a little low, you could run your lights 24/7 now which will keep your temps more stable. You may also want to put something to use as a humidity dome over them, at this stage a higher humidity will definitely help. I have never used the jiffy pots but I still have some trouble getting watering down. I will say it seems to be better to let them dry out rather then to water too much. Seedlings I can usually go 3-5+ days between watering, at 3-5 weeks old it usually goes 2-3 days and depending on the size of the final pot it goes to 1-3 days especially during flower. Hopefully this helps some and someone who has used jiffy pots/soil can help out with the watering part. The last piece of advice that I can offer is that it is usually better to step back a bit and just let your plants do there thing. My first grow I was always trying to find something to do with the plants and it always made things worse or created new problems. My second grow I took a more hands off approach and it paid dividends. Best of luck to you!