NS is well established, yet besides using https://www.freehostia.com/ for hosting and buying one of my own domain names, I myself actually used Google domains due to the price.
If you find you cannot get your site listed as secure (https vs. http) you might want to see https://www.comodo.com/e-commerce/site-seals/secure-site.php
I got started with NS in about 1993 when, on the advice of a friend, I purchased my first domain - “my own name” dot com. I had never heard of the internet at the time but, after it was explained to me, I recognized the importance of owning my own domain name. Now I have several sites hosted at NS. Some actually generate income enough to pay for the hosting services and more.
Those free services are fine for vanity sites but they did not meet my needs. For e-commerce the quality of service is what matters...
...in my opinion.
That NS has served my internet needs for nearly thirty years of course colors my view on the subject.