so far your seedling looks fine...the water in the mason jar is uneccessary at this point, as your plant doesnt even have roots to soak up the water, so you will have to top feed it until then...guess it will work to catch your overflow water...Im takin it ur trying to do a DWC?..if so, your going to need to make that mason jar light proof....light leaks promote algea in rezzies and that, you dont want....also when you start using your jar as a rez, i would suggest using a small airpump and airstone to get some oxygen in that water...for now, lay off of any nutes...she/he doesnt need them at the moment...i personally start my seedling on nutes sometime around week 3...some people sooner, some later im sure....