1 - Liveing without nutrition will be sustainable for some days but surviving without water is not possible.

2 - When I arrived home, the aroma announced she had cooked a delicious meal.

3 - Although his background was not good, he forgets former activity and struggles to start again.

4 - My friends cram my mind with craps things that I’m conflicting with myself to vanish ignore them.

Could anyone correct these sentences?

Please correct below the sentences below.
Thanks.

{I've added alternate phrasing in blue, which sounds more natural.}

1-Living without nutrition will be sustainable for some days, but surviving without water is not possible. =>One can live without food/nutrition for several days, but one cannot survive without water.

2-When I arrived home, the aroma had announced {signaled, indicated} that she had cooked a delicious meal.

3-Although his background was not good, he forgets has forgotten his former activity and struggles to start again. => While he had a troubled past, he had left behind his former life and strives to start over.

4-My friends cram fill my mind with craps useless things that I’m conflicted with myself to vanish on how to banish them. => My friends fill my mind with such useless/worthless ideas that I'm at a loss as to how to get rid of them.