Using regular physics a human scaled up that much they would immediately start to collapse into a pulpy sphere of mostly water, which would further collapse into a star. If you ignored the giant human's body pull on itself, then you'd have to look at the Earth pull on the flesh of the giant, trying to put what amounts to a giant hand shaped water balloon inside a planets roshe limit probably won't end well. If we ignore that, then the Earth would be deep inside your hand's gravitational field, so you probably wouldn't need to squeeze, just having your giant hand near the Earth would cause it to rip itself apart. If we ignore all the gravity based physics then the question becomes "How would muscles larger than planets actually work?".

I guess what I'm trying to say here is that to answer your question is "We have to ignore so much physics to make your question even possible that it's kinda meaningless." It's like asking "If ducks were made of cheese how fast could they fly?"

No, I don't think so.

The Earth's density is 5.51 g/cm³.

For comparison, a baseball has a density of 1.3 g/cm³.

Even just the Earth's surface crust has an average density of 2.7 g/cm³ (it's more dense under the ocean)

Unless you can compress a baseball with your hands, you're not making a dent in the Earth.

The only way it would work would be if your strength increased proportionally with your size, which isn't the case normally for humans (someone 20% taller than another person isn't necessarily 20% stronger than them).

you could, because the crust is relatively thin, already has cracks and it's molten (magma) inside.

Just gripping it would probably destroy it, because it's rotation and inertia would rip it apart at the continental rifts.

Perhaps, but you would burn your hand. Earth is filled with molten rock and iron.

If you assume your body composition would allow you to move at a comparable pace then you would absolutely be more dense than the earth. Imagine if the earth were ripped from it's current path as you wind up to throw it, it should sheer to pieces like a ball of molten metal and sand.

No because you’d suffocate before you could destroy it.