Tor is explicitly not private, only anonymous. The end node can see all the traffic you send through it if it's not encrypted. If privacy is your main concern, tor is definitely not the right tool to use.
It depends on how you use Tor. For example, visiting your own personal homepage and then using the same relay to visit a NSFW site would be bad OPSEC. Also, Tor comes pre-installed with HTTPS Everywhere, and you can toggle a setting that disables all http traffic if you're worried about sketchy exit nodes analyzing your plaintext traffic.
Remember: Tor can't read your mind. If you want true anonymity you have to go through extraordinary lengths to achieve it, and even then, you could make mistakes.
Also HTTPS everywhere isn't enough; you also need ESNI, which requires server support.