AMHERST SOUR DIESEL FIRST GROW!

Hey everyone, This is my first ever grow! This is a 7 year old seed so i was looking for some tips from you lovely people! This is from day 1 from sprouting to day 10! I used the paper towel method and it took 35 hours before any kind of root appeared. I repotted her as she was too big for the little pot she was in and roots where visible from the bottom, since transplant, her leaves seem abit lighter in colour, i am wondering whether i have over watered or its some kind of deficiency? I have tested the ph level of the soil so i am thinking its over watered so gunna let the lady dry out abit. Ph level was 6.5 should i bring it down? Do not want to kill her with too much love.