As an example, Ebru, consider shoes: Mostly they are either stylish or comfortable.

Here, I use 'whereas':

Whereas some boots can be neither stylish or comfortable.

Of course some footwear can be both stylish and comfortable.

Neither is effectively the negative version of both.

If you have two friends - you can say "Both of my friends" (positive) or "Neither of my friends" (negative).

If you have more than one friend, you can say "All of my friends" (positive) or "None of my friends" (negative).

If someone asked you if you have a boyfriend, you might say "No one special".

If a teacher asked a question, and there was no reply, you could say "No one knew the answer."

If you were the only one to reply: "No one knew the answer but me."

Does that help?

Consider you have 2 options: A and B.

either means you only have an option with A or B

neither means you dont have any option neither A nor B.

both means you have options A and B

all means you have all options. in this case both A and B.

Consider you have 2 people: B and C.

no one means you dont have anyone avaliable.

none basically is a short form of no one.

any means you have all options/people available

whereas is used when you have 2 opposite results in the same sentence. You place whereas in between them.

but is used when you disagree with some argument, You write ur disagreement after but.