I'm in a similar situation...
This helped me set it up. I ended up having to pay for a VPS because my ISP has some port restrictions.
https://community.start9.com/t/guide-bolt-cards-lightning-address-and-reverse-proxy-all-the-things/675
https://community.start9.com/t/guide-bolt-cards-lightning-address-and-reverse-proxy-all-the-things/675