Grammar help please?

Hi there,

Can you check for me if I am grammatical correct in these sentences, please?

I am afraid/scared of doing that.

Don’t be afraid/scared you will be ok.

Don’t scare yourself, you will be alright.

I accidentally scared myself by looking the mirror last night.

I feared of water. (Grammatical)

I sacred of water. (Ungrammatical)

I am scared of water (Grammatical)

I am feared of water. (Ungrammatical)

Thanks.