Checking in for advice please

Happy Fourth of July everyone. I wanted to do a quick numbers check to make sure everything is going well. My numbers as of this Tuesday morning using Aquachem brand 5-way test kit from Walmart are:

FC 5.0
TC 5.0
Ph 7.6
CYA 50
Calc 400
Alk 70

Over the course of 5 days I've been maintaining the water, my numbers have remained stable. Therefore I've added nothing to it, just monitored and cleaned. I kind of expected to be tinkering with the water every day so it feels a little weird to just do nothing, like I might be missing something - that's ok right?

Now, this morning my Ph is up slightly from 7.4 and my Alk dropped from 120.

1)I know I need to add baking soda for Alk to bring it up a bit - but what number do I shoot for (good range is 80-120)? Is it based on other numbers? Please explain as I'd like to understand they WHY of it also.

2)Should I add acid or just leave the Ph be for now? Why or why not?

3)My hardness number is in the upper range, I think. Should I leave it be?

BTW - I'm waiting on the TAYLOR K2006 test kit to arrive any day now. Can't wait.....