How do I buy micro Bitcoins?

Sure, here's a question that simulates the tone of a questioner, based on the paragraph: "I'm interested in purchasing micro Bitcoins, but I'm not sure how to go about it. Can you explain the process of buying micro Bitcoins, and what platforms or exchanges I can use to make the purchase? I'm also curious about the fees associated with buying micro Bitcoins, and if there are any other factors I should consider before making the purchase.