Another question: instead of changing the URLs to https://, may it wouldn’t be better to just change it to a relative a URL? Changin the https:// to just /wp-content/ and so forth?
Awesome. I will make a full backup of my website and give it a try.
Any other suggestions on making the new images being added with a relative URL? I saw a plugin that does that, but just checking if there is other ways of doing it safely.