New Pool in a week

Thanks,,
I,m the proud owner of a TF100 test kit so good to go there, The pool has yet to be opened from a Michigan winter. water under the pool cover looks decent
I can see the ledge in deep end appears to be lots of leaves in bottom of pool.
The pool cover has a good foot of water on the top of it and a hundred tadpoles or so.
I plan on draining water above cover first along with scooping out the wildlife population.
I can then test water first to see what I got.

Then after that I,m Clueless and so New,,,

So What due I look out for first ???
Thanks in Advance.. love the site and the idea of using BBB. Looking forward to get started.