You don't have to run an exit node to help. Just run a guard / middle node. I have been running nodes at home and in data centers since at least 2014 and the only problems i had was one site that redirected me to their .onion site because it thought i was using Tor and once I couldn't access a website because it was hosted in China which blocks all IPs that host Tor nodes.

For Exit nodes it's more complicated. You should read at least [0][1][2] before thinking about running one.

[0]: https://community.torproject.org/relay/community-resources/t...

[1]: https://blog.torproject.org/tips-running-exit-node

[2]: https://community.torproject.org/relay/community-resources/e...