How to choose a SEO friendly domain name?

Hey there everyone. When I was creating a site, I encountered a problem, how to choose a domain name. What should it be? What can I use when choosing a domain name? What should I focus on? What can you advise me? The theme of the site is my business (children's goods). I really don't want to make a mistake with the choice of domain name. In my opinion, it is an important thing for my future site.

I hope you help. Thanks in advance.