Not sure if making searches from a registered account is the way to go for people who “care about utmost privacy”
You probably want to use one of the ones that lets you search without registering.
https://www.privacyguides.org/en/search-engines/#recommended-providers
https://discuss.privacyguides.net/t/kagi-search-engine/14172/95
Right, always this link to show that signal isn’t trustworthy and then lists “good alternatives” that are either less secure or less usable