How can I get an ens?

Could you elaborate on the process of acquiring an Ethereum Name Service (ENS) domain? I'm interested in understanding the steps involved from start to finish. Firstly, where do I begin the registration process? Are there any prerequisites or specific wallets I need to have? Additionally, what factors should I consider while choosing my ENS domain name? Are there any naming conventions or restrictions I should be aware of? Moreover, what are the associated costs of acquiring an ENS domain, and are there any recurring fees? Finally, how long does the entire process take, and are there any common pitfalls or challenges I should avoid? Thank you for your guidance.