Home Assistant Docker, remote access - but already with NextCloud Docker?

I've come a long way in the past few months, from building my first PC/Server earlier this year, I've now done the following:

• Unraid set up & running,
• Plex set up with associated Dockers (NZB/BT),
• NextCloud set up, with Swag for remote access/backup (via DuckDNS & Cloudflare), and finally
• Home Assistant Docker, with a Zigbee2MQTT & Mosquitto Dockers to run the Zigbee devices directly

So quite a bit done, but I'm admittedly very new when it comes to Linux & networking, and have finally hit a problem I can't seem to find a ready solution for.

Long story short, I want to enable remote access to my Home Assistant docker, but the NextCloud remote access is already using the same ports, and Swag (reverse proxy?).

It would seem I should configure Home Assistant in a similar way to NextCloud - through Swag, and DuckDNS.... But how would I do this?

There seems to be a good guide here: https://community.home-assistant.io/t/remote-access-with-docker/314345 but uses the same ports as my Nextcloud config, so I'm a little lost.

Anyone able to offer some tips/suggestions? 🙏