I deleted my Facebook account back in 2017. If you still have an Facebook account, maybe think again if you really need it. There’s this site and Kev Quirk also wrote a list of reasons why using Facebook might be a bad idea.
Although I have no Facebook account anymore, I still use WhatsApp and Instagram. WhatsApp is really popular in Germany (despite being owned by Facebook) and without WhatsApp you would socially exclude yourself from too many things.