What If?

What if I've studied 'English' as my father wanted?

What if I had studied English as my father wanted?

If you expand the contraction of "I've", your sentence becomes:

What if I have studied English as my father wanted.

This is wrong, because "have" is a present-tense verb, when your sentence is past tense.  Therefore, you need to use "had" rather than "have".

Also, there is no reason to use apostrophes around the word English.

What if I've had chosen my dreams & battled?

What if I had chosen my dreams and battled?

Never use an ampersand (&) within a sentence.  It may be used in a title but, even then, it is usually better to spell the word "and".

Also, a native speaker would likely use a difference sentence:

What if I had followed my dreams?

What if I've said 'Yes' to him & we got married?

What if I had said 'Yes' to him and we had married?

The word "got" is okay, but there is usually a better word.

What If I can live longer to be amazed & dazzled?

What if I can live longer to be amazed and dazzled?

Except for the ampersand (&), the grammar and spelling in this sentence was fine.  However, I don't really know what the sentence means.

What If..

What if...

Because this is a sentence, and not a title, the second word should not use a capital letter.

Also, an ellipses (...) uses three stops, not two.