How to purchase an ens name?

As a crypto enthusiast, I'm interested in purchasing an ENS name but I'm not entirely sure how to proceed. Could you guide me through the process in a concise manner? Specifically, I'd like to know about the steps involved in searching for an available name, bidding for it if necessary, and finally completing the purchase. Additionally, I'd appreciate any tips or considerations I should be aware of before making such a purchase. Could you elaborate on the costs associated with acquiring an ENS name and any potential risks I should be mindful of?