Hi everyone!

The words are 'want to'—please use them correctly.

andybusythe difference between feel confident or feel confidence?

There is no difference in intent.

andybusy the difference between For silent or for silence?

Neither makes any sense to me. Do you have an example sentence?

Confident and silent are adjectives. Confidence and silence are nouns.
He feels confident that he can do it. My brother has little confidence in himself.
We must keep silence in the library. The desert at night is eerily silent.

So it is the same to use feel confident and feel confidence

Because I normally use feel confidence, but today in the news report I saw feel confident and that is why I am wondering if there is a difference between feel confidence and feel confident.

For silence or for silence,

That is in a situation that my friend was trying to ask me out today, but then she wanna change

Thank you very much, can you tell me when to use adjective and when to use noun in a sentence?

A noun identifies a thing, person or concept: man, girl, marriage, automobile.
An adjective describes it.

andybusyFor silence or for silence,That is in a situation that my friend was trying to ask me out today, but then she wanna change it to another day! So she said "Enjoy stay at home, For silent" I guess she is trying to said "Enjoy staying home for a silent day!"

None of that is native. 'For silent' is not possible grammar as it stands; 'for silence' could be