How do I buy manta?

Could you please elaborate on the process of acquiring Manta? As a newcomer to the cryptocurrency market, I'm a bit overwhelmed by the various options and platforms. Could you provide a step-by-step guide on how to buy Manta? Specifically, I'm interested in knowing which exchange supports Manta trading, what are the necessary steps to set up an account, how to deposit funds, and ultimately, how to execute the purchase. Additionally, are there any specific risks or considerations I should be aware of before investing in Manta? Your guidance would be greatly appreciated.