New install - Questions prior to loading chemicals/turning on hardware

[tfp-NE]

First, thank you to whomever is reading this and thanks for this incredible resource in general.
Our concrete is being poured around pool today and after it sets up we will be installing our hardware for the first time. This has been a DYI install and the water has been in pool filling/filled for 4-5 days. Thus far it has a little dirt/grime in it but not overly cloudy. I have 2 key question areas as we enter this exciting final step:

1. I have been testing the water as we have setup the pool area for the last 6 days or so - no chemicals added and using simple test strips, logging into pool math, trying to get a hang of all of this before I do my "real test" with my Taylor kit: results of my tapwater: FC: 0, PH: 7.6, TA: 120, CH: 250, CYA: 40. I understand that test strips are not fully effective so asking this question as I go to do a true test:

• Should I wait until the hardware is all setup and water is circulating to test again, or do a true up test today prior?
• At this stage - pre-hardware, I should not preemptively shock or add any other chemicals, correct?
• When hardware is done, I will obviously need chlorine - Should I turn on chlorinator and shock at same time when we are setup? Or choose one method over another?

2. I have seen some videos that during concrete install, some concrete particles will get into pool. Is there anything I should do preemptively or be ready to do to clean this out, or will filter do this hard work for me? (I know I will need to get in there if any large clumps get in an solidify - talking dust/tiny amounts here. Our goal is to be extraordinarily careful today but wondering if there are any tricks/tips I should be ready for.

Specs below (and thanks again).

 

[HermanTX]

It is unusual for tap water to have CYA. Did you already add some stabilizer/conditioner as it was being filled?
I would use the K-2006 test kit now to get accurate readings before you add anything. As a basic plan, upon filling a new pool you would add stabilizer to get it up into 40 range and add chlorine to get it to 5ppm. This way you prevent algae and then adjust pH and other parameters. Can you run some type of external pump with hose to circulate water until you get your pool equipment plumbed in? Try not to let it sit too long if possible. Maybe just rent a gasoline driven pump for 8-10 a day of run time. I am sure others will jump in with other ideas.