Besides accessing your page are random people able to use your server as an exit node? Am I thinking the right thing... I met someone in Switzerland that was hosting anonymous exit nodes to some anonymous network and he said that it was a pain having to explain what was happening to the police.
Nice thing is you skip port forwarding entirely, which matters a lot if your ISP has you behind CGNAT. Curious how people handle uptime though, since a hidden service going down isn't something you notice until someone tells you.
Ran a small onion site for a couple years and the nice part is you never touch a public IP or a cert. Downside is onion v3 addresses are impossible to share verbally and the latency makes anything chatty feel broken. Static pages only, honestly.
To make sure once in the .onion, you never leave the .onion
(There are solutions for CGNAT - https://david.alvarezrosa.com/posts/self-hosting-behind-cgna...)