How to buy DOGE on chain?

Could you kindly elaborate on the process of purchasing DOGE on the blockchain? I'm particularly interested in understanding the steps involved, from setting up a wallet to executing the actual purchase. Additionally, are there any specific platforms or exchanges that you would recommend for this purpose? Furthermore, are there any security measures I should take into consideration while engaging in this transaction? I'm also curious about the associated fees and whether there are any limitations or restrictions I should be aware of. Thank you for your assistance in guiding me through this process.