Essay correction

Is it right?

Me and John is going for fishing. Do you know John? He is my friend.

I Know john since 2000. We met when I was touring Europe. He was also chartered in the same travels. He was a nice guy with a good smile.

One more
I am trying to reach her since four months —is it right ?

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Not good; let’s improve them:

[i]John and I are going fishing. Do you know John? He is my friend.

I have known John since 2000. We met when I was touring Europe. He was also booked on the same trip. He was a nice guy with a pleasant smile.

I have been trying to reach her for four months[/i].
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When will i use “Me/I” I am not able to differetiate between both

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Use me (and her, him, them, us) when it is:

the object of a verb: The truck hit me.
the object of a preposition: between you and me; to/for/from me, etc.

Use I (and she, he, they, we) when it is the subject: I ran/danced/curtsied/etc.
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Hello

How are you
I have Essay about the Balfour Declaration
Could you please check the grammar mistake and the structure ???