Newbie here and trying to open a 22,0000 gallon salt water pool ourselves - HELP!

[Watermom]

Good decision to order the K-2006. It will make your pool maintenance so much easier. Keep some chlorine in there so the pool doesn't turn green. Until we know your CYA, it is hard to tell you how much bleach to add since chlorine level is based on CYA level. (Read more about that in the Best Guess Chlorine Chart in my signature below.) In your pool, each gallon (4 quarts) will add about 2.25ppm of chlorine. Use that as a reference. For now, test in the evenings and add enough bleach to take your chlorine level back up to about 5-6. If you find that by next evening when you test that you have no chlorine left, make that night's dose a little bigger. Once the new kit comes and you can test your CYA, somebody here can tweak the advice about chlorine levels for your pool.

Your pH is too high. Use a little muriatic acid to lower it a little. Aim for 7.4-7.6 but anywhere between 7.2-7.8 is ok. Read the following for how to use the acid safely. I'd say start with about a pint and see how much that drops it. Then, redose as needed.
Using Muriatic Acid Safely