What if...

What if I am a millionaire...
What if I am a talented artist...
What if I can sing well...
What if I can speak English very well...

There’s no such what-if thing, if you really want something, work hard for it =)
And make it becomes a real thing!

::::::::::::::::::::::::::::::::::::

Hi, Chelsea!  You are very wise.  I totally agree with you when you write: If you really want something, work hard for it.

Here are my corrections of your work:

What if...
What if I am a millionaire...

What if I were a millionaire ...
What if I am a talented artist...

What if I were a talented artist...
What if I can sing well...

What if I could sing...
What if I can speak English very well...

What if I could speak English very well...

You are using the Second Conditional Tense that we use when we want to talk about a situation that is not real -- things that you can imagine or dream.

The full sentence structure is:

IF + past simple tense + would

If I were a millionaire

or

If I was a millionaire ... I would travel around the world!

What if...

What if I am were a millionaire...
What if I am were a talented artist...
What if I can could sing well...
What if I can could speak English very well...

There’s no such what-if thing, if you really want something, work hard for it =)
And make it becomes a real thing! make it comes true.

http://www.grammar-monster.com/glossary/subjunctive_mood.htm

I'm not native speaker and I'm learning too. but if I were you I will write like above :)