Second Conditional

The second conditional is used to talk about the present or future situation?

I'm so thin. What should I do?

If I __ (be) Bill Gates, I ______ (donate) all of my money.

i'm having a headache

If I become a bird, I would fly to Canada. What's wrong this this sentence?

The second conditional is used to talk about real or unreal action and situation the present

If I ________ (have) a talking cat, I _________ (sell) it for money.