The domain name of your website is very important, but not for the reasons you think. When the internet first started, it was easier for people to be able to get the best results from their domain because the web was empty and only a few thousand sites existed. Now things are completely different and we have to adapt to those changes.
The modern domain name is not very helpful in terms of SEO. Content rules the SEO world now, but this doesn’t mean you should be choosing any random name. Your domain name needs to be easy to read, easy to pronounce and easy to remember. That is the key to a successful domain name.