If you're thinking about risks, it's important not to conflate 3 scenarios: (1) running a Tor exit node (potentially very risky), (2) running a Tor relay node, and (3) just using the Tor browser as a user (should probably be fine for most users - depends on what you use it for of course, and Tor by itself is of course not sufficient to solve all privacy issues - you can still be deanonymized if you're not careful).