I self-host a couple of services, but I haven’t exposed anything outside my home network. I want to self-host my calendar, but not sure if I can do it without exposing it. Any recommendations on the best way to go about this? For those who do self-host a calendar service, how do you keep it secure?
Just myself, but I would like to keep it synced between my phone and my laptop while also keeping a backup.

This is the first time I’ve heard of mTLS. Sounds interesting, any tutorial recs?