Security concerns with locally self hosting publicly accessible app? - Lemmygrad

Would I be compromising on the security of my local network and all the devices on it? I have a ton of local-only self hosted services, some may have personal data that I would not be compromised of affected. Now of course, I can work on securing those local services from each other, but still, the idea of opening up a port to the public seems incredibly insecure to me. Is there a way to host services publicly from a local network without compromising on security? I know I could host on a cloud provider or VPS, but for certain things I’d prefer to keep it local (especially for things that may violate VPS providers’ terms of service, like media apps)