kevinmitnick

Lets encrypt will work find, but they are offering SSL for 90 days only. That means you need to reissue your certificate for each 90 days of interval. This will become more hectic. And if you forgot to reissue your website will no longer be encrypted.

It will be better to get SSL Certificate from trusted SSL Certificate Authorities.

Here's the comparison of Domain Validated SSL Certificate of Trusted Certificate Authority - https://aboutssl.org/comparison-of-domain-validated-dv-ssl-c....

WIX is not supporting SSL Certificate, thats the reason and there is no option to Add it.

Here's the comparison of Low price SSL Certificate - https://aboutssl.org/compare-standard-ssl-certificates

Choose the best one for your website.