The solution to #8 is:

POUND

You have already found the correct answers to the five questions in your comment below the question:

JUNE, PHILADELPHIA, RONALD REAGAN, TAYLOR SWIFT, and DICE.

What you are missing at this point is a way to order them in the grid beneath. And to do this you need to exploit the overall theme, and use some elementary knowledge of...

...the scoring system in tennis. Specifically, you need to know that before a point is scored in tennis a player is said to be on 'love' (the tennis term for 'zero' or 'nil'). Then the first point is 'fifteen', the second 'thirty', the fourth 'forty, and then if a player wins the next point (and their opponent is on 30 or lower) then they win the game.

In other words, we have a natural ordered sequence in tennis, of love, fifteen, thirty, forty, game... and these exact words are hidden in the puzzle text, one per question!

...the "city of brotherly love". (PHILADELPHIA)
...the singer of "Fifteen", "22", "Shake It Off"... (TAYLOR SWIFT)
...the second month with thirty days... (JUNE)
...US president number forty... (RONALD REAGAN)
...I should play a game of Monopoly... (DICE)

Place the answers into the grid in this order...

...and the spaces featuring tennis racket images spell out the hidden word POUND, which is likely the answer you're looking for!

(No significant progress on #6 yet...)

The solution to #6 is:

EGGBOXES

You have already found the correct answers to the eight questions in your comment below the question:

LOBSTER, JUNGLES, LAGOONS, BATHTUB, POSTITS, DROPBOX, LIMEADE and BLOSSOM.

But you'll find it helps if you overlay these with the test pattern colours:

And now consider which of these colours each item usually is (or is closest to)...

A lobster is red.
Jungles are green (with foliage).
The water in lagoons is (approximately) turquoise.
A metallic bathtub is silver.
Post-its are (originally) yellow.
The Dropbox logo is blue.
Limeade is green.
Blossom is pink.

Highlight the letter in each word that shares its background colour with the colour of the object, and you spell the word EGGBOXES reading downwards!

Meanwhile, the solution to #8 is:

POUND

Again, you have already found the correct answers to the five questions in your comment below the question:

JUNE, PHILADELPHIA, RONALD REAGAN, TAYLOR SWIFT, and DICE.

What you are missing at this point is a way to order them in the grid beneath. And to do this you need to exploit the overall theme, and use some elementary knowledge of...

...the scoring system in tennis. Specifically, you need to know that before a point is scored in tennis a player is said to be on 'love' (the tennis term for 'zero' or 'nil'). Then the first point is 'fifteen', the second 'thirty', the fourth 'forty, and then if a player wins the next point (and their opponent is on 30 or lower) then they win the game.

In other words, we have a natural ordered sequence in tennis, of love, fifteen, thirty, forty, game... and these exact words are hidden in the puzzle text, one per question!

...the "city of brotherly love". (PHILADELPHIA)
...the singer of "Fifteen", "22", "Shake It Off"... (TAYLOR SWIFT)
...the second month with thirty days... (JUNE)
...US president number forty... (RONALD REAGAN)
...I should play a game of Monopoly... (DICE)

Place the answers into the grid in this order...

...and the spaces featuring tennis racket images spell out the hidden word POUND, which is likely the answer you're looking for!