Registering a domain name is easy. There are so many websites to register a domain name but my personal recommendation is to use GoDaddy. GoDaddy has been around for ages and they are a one stop shop for registering a domain, buying hosting, as well as securing your site.
Visit GoDaddy and search for your desired domain name and add the name to your cart. Beware of extra items added to your cart. If all you want is a 1-year domain registration, it shouldn’t cost more than $12 for the year. I recommend registering the name for a year and just letting it auto renew every year. This gives you the versatility of deciding whether to keep the name or ditch it if business plans change. You can also manage multiple domains with a GoDaddy account and don’t have to re-register if you want to purchase another domain in the future..