I will also leave whatsapp. It’s true that I hardly use it. In my case I use Telegram. Why to Signal? Telegram is much more widespread than Signal. I understand that Telegram is not 100% secure, but neither is Signal when you need a phone number. That is the first rule.
I’ve used DDG for years but I’m worried that Microsoft has some power with them. Also that its headquarters is in the US, where there are hardly any laws that protect the user. I used Qwant for a season, based in France, but he asked me to remove the browser’s ad blocker. Since then, I use a SearXNG instance, waiting to mount my own. Very happy.