This website can be used to find some functional domains quickly. The name of the site is the name boy (https://www.nameboy.com/). An instantly unique domain can be found on this website. Not only that, but small domain names will also give you suggestions by adding pronunciation.
That’s the decent thing to do, and it should end there. Again, to find the right domain will kill a lot of time.
How to know if the domain is available, If you go to the search option and type a name and it is red, then you will understand that the domain is not available.
If the domain name is green, then the name is available. If available, click on the buy now to go to GoDaddy.It would be better not to buy a domain from GoDaddy because it charges less in the first year and charges more later.
For that, if you buy the domain from Namecheap (https://www.namecheap.com/), you can get many cheap rate domains. I also purchase domains from here.