Welcome!
You're starting with a fresh fill, so that makes things easier. Unless you're filling from a well....
As stated above, first thing is to get the filter going and check for leaks.
Second, add 2 ppm FC using bleach. If the pool is 10,500 gallons, a quart of standard 8.25% bleach will do that.
Third, add stabilizer. You can buy it at Walmart. 3½ lbs poured into a sock and tied up and either set in the skimmer or hung over the side in front of the return stream so it dissolves fast. It'll still take a few days. When it's all dissolved , it should have you at 40 CYA.
Fourth, test pH. Hopefully you still have at least a basic pH/TC tester from the last pool. Adjust that so it's between 7.2 and 7.8. If you post the readings, we can tell you what it needs exactly. (But we'll expect you to learn how to use poolmath yourself pretty quick)
Fifth, take your daughter inside and slather her with sunscreen and changed into swimsuit. That's it. The pool is swimmable. :splash:
The next day, you'll need to add another quart of bleach
By day three, you'll probably be wanting to check your FC level and calculate how much bleach you'll need to reach the
new target of 5 FC. And retest pH.
Somewhere in there you need to find time to order up a
proper test kit. That pool is no kiddie pool, 10,000 gallons is a bunch of water. Too much to dump out if it gets yucky. So you need to test and dose it yourself. Don't worry, it's easy. In a couple weeks it will be as routine and time consuming as brushing your teeth. And you'll also want to read
ABCs,
Recommended pool Chemicals (What does what and how to add it) and
Poolmath (How much to add)