Hello,
You can try our module, and you don't need to be technical at all, it makes everything fast and smooth.
https://addons.prestashop.com/en/website-security-access/26745-one-click-ssl-lets-encrypt.html
No matter what side you are on (merchant or customer), a good online experience tends to involve a trusted third party and good encryption.
Sometimes, migrating from HTTP to HTTPS can be tricky and things might not work as planned, so, One Click SSL module helps the webmaster to go through all that and save time.
Using a SSL certificate from Let’s Encrypt increases user's trust in your website and customers feel confident in making purchases.
Your online store's SEO will improve, by receiving a small ranking boosts on search engines (especially on Google)