Since you are analyzing a focused site, unless you are
trying to set up an ongoing content analysis dashboard,
you can probably get away with using a spreadsheet.
That said, any extra fields you add here will magnify your
manual work. So you still should not take a kitchen sink approach
to your analysis, but still be deliberate with the fields you add.
Since you are analyzing a complex site, you need to be very
aware of how difficult it will be to get the values (or
figure out a way to sample and create rules to leverage manual
effort).
Some fields
have more value than others in content analysis (the content analysis value is the
y axis) and some are more amenable to automation (the x axis).
We'll do ③ and ④ after you add at least one field.