Kitten advice needed

Agree about declawing. It is actually removing the finger at the first knuckle.
I shiver to think about that happening to me.

Sisal rope scratchers last a LOT longer than cardboard.
Cardboard tends flake off all over the place.

Clear packing tape on the corners of furniture helps to dissuade scratching, and blends in with the fabric.

There's been some recent research that suggests spay/neuter too early can arrest the emotional development IE the can never reaches puberty and remains in a child like state.

That's not good for either of you.

The older/closer to that six month age, the better.

Fleas are less likely if indoor only.

I totally understand that animals should be allowed to be animals and that entails freedom to be outdoors...however, as noted earlier outdoor and indoor outdoor cats have a much shorter life expectancy.