Craz.....

You need to learn on your own judgement about the water. Those moisture meters, unless they are the good electronic kind, suck dick.

Dont waste your money.

Ideally, you want the soil to be dry a couple of inches deep. But this is a seedling so make sure you keep her moist for the first week at least.

Some water dripped right down by her stem and root should be good.

Without pics, it will be difficult to give you anything other than general advice.

Why would you buy a MH? I would get a digital camera first

But seriously, if you have a couple of 200W CFL's, an MH wont do shit compared to those for a while.

Keep the CFLs for now. NO nutes till at least 3 weeks.

Very important is 6.8 pH adjusted water right now.

If the Mrs. smokes with you, get her a good strain and she'll be joining you in the grow