Remote access trouble

I’ve been son the struggle bus trying to get me domain name to point to my HA server (windows 10PC converted to HAOS). I know my public IP address and the address on my network of the HAOSPC and I have followed tuto’s on Youtune (https://www.youtube.com/watch?v=7smjmAnryp4&t=381s). I opened ports 80/8123, 443/443, 8123/8123, and 2000 (according to my router website. None of which allow me remote access to my server. I (at some point) was able to gain acces to my router through some combination of he configuring, but I can no longer do that. I have ensured several times that the video was followed closely and my NameCheap acct is configured correctly.

Any help would be welcome. Ports and routing are foregin territory to me. TIA