Self-Hosted Main

I've got Plex running on a Windows machine in my rack, it works fine and I don't really want to change it. This machine also runs Radarr, Sonarr & Prowlarr...they all work great. So now I just added Ombi which also works fine for me, everything works together as it should.

Now my issue is that I want to allow the people using my Plex server access to Ombi so they can make requests however this seems an impossible task for me at this stage.

I have a dynamic IP, I already have a no-ip ddns address, I also have my own domain also which I'd like to use for people to access it, example: mydomain.uk/request

My issue here is setting up the reverse proxy. I have googled many different guides but finding one for Windows which isn't 5+ years out of date (with steps which no longer work) seems the impossible task. I have nginx installed and working (localhost displays the nginx page as it should) but I'm stuck on the letsencrypt certs for the domain and how to configure anything past this stage.

For the love of god please does someone have a guide or video which is actually relevant for a Ombi install on WINDOWS which allows external access for others using a domain? I wish I could just whack this all on a Linux VM but unfortunately thats not practical for me, it needs to be on this Windows machine.