The ph kit you have is only accurate to +/- 1 so not perfect but it will do. Grab an electronic when funds permit as these are just way more accurate.
Baby bagseed is loving your tlc mate. It also looks perfect for the case with it's compact stature. Nothing scientific but I generally find that plants with such tight node spacing turn out to be girls. Got my fingers crossed for you.
The germ chamber seems pretty effective too. You're getting the hang of this stuff pretty quick, but those seeds need some soil very soon. I usually pot them up at around half that length. Try not to touch the white taproot but don't be too concerned if you do.