How can I improve my writing skills in minutes?

You can’t improve your writing skills in minutes. You can’t write a perfect story in minutes. You can’t write, sell and become a best seller in minutes. You can’t make heaps of money writing in minutes.

If this is why you write, do yourself a favor and move on. Writing is work. It’s wonderful work, but it’s not glamorous or automatically lucrative, and NO ONE learns the writing crafts easily or fast.