How to buy arweave on a dex?

Could you kindly elaborate on the process of purchasing Arweave on a decentralized exchange, please? I'm particularly interested in understanding the steps involved, from setting up an account to executing the trade. Could you also provide any insights into the fees associated with such transactions, as well as any potential risks or considerations I should be aware of? I'm new to the cryptocurrency space and would greatly appreciate your guidance on this matter. Thank you in advance for your assistance.