How to buy chain swap on Coinbase Wallet?

Could you please explain in detail how one can purchase Chain Swap tokens using the Coinbase Wallet? I'm a bit new to the cryptocurrency world and would appreciate a step-by-step guide, including any necessary precautions or considerations I should be aware of before making the purchase. Also, is there a minimum or maximum amount that can be bought at once? Lastly, is the process similar for both iOS and Android users? Thank you for your assistance.