How to buy MATIC on Polygon chain?

I'm interested in purchasing MATIC tokens on the Polygon chain, but I'm not sure how to go about it. Can you guide me through the process step-by-step? What are the requirements I need to meet in order to make this purchase? Are there any fees associated with buying MATIC on the Polygon chain, and if so, what are they? Also, are there any risks involved in the transaction, and how can I minimize them? Can you recommend any reliable exchanges or wallets that support MATIC on the Polygon chain? I appreciate your help and expertise in this matter.