How to purchase Nano?

Excuse me, could you please elaborate on the process of acquiring Nano? I'm interested in understanding the steps required to purchase this particular cryptocurrency. Is there a specific exchange or platform that you recommend for beginners like me? Also, could you shed some light on the necessary precautions and considerations one should take before making a purchase? Additionally, how does the Nano network's fee-less and instant transactions factor into the decision-making process? I'm eager to learn more and would appreciate your guidance.