To get a domain name step by step, the first thing you need to do is choose a domain name that aligns with your brand. Ideally, this should be done simultaneously with the process of coming up with a brand name. Once you have decided on a domain name, you should check its availability by using a domain search tool provided by domain registrars. Next, select a reliable domain name registrar, preferably one with good customer support and competitive pricing. After selecting a registrar, proceed to purchase and register your chosen domain name. Lastly, remember to renew your domain name periodically to ensure its continued ownership and availability.