"Connection Refused" Error when connecting to Proxmox web GUI

Hello all! I am very new to proxmox and networking in general. I was into it months ago, but stopped due to school and extra curricular activities taking up my time. I've recently gotten back into it, but I've forgotten almost everything I knew before. I went from a TrueNAS Core server for cloud storage to Proxmox because I switched my motherboard (which caused issues I didn't know how to fix) and because I wanted to create VM's.

Starting the install of Proxmox VE 8.1, I went through and selected all the correct info, but the main part I have an issue at is IP addresses. I used my subdomain that I made on FreeDNS, and used what I thought to be an open IP on my network for the address for the server. (I am not sure how to check this, as I said my knowledge is limited). For DNS server, I used the default 127.0.0.1. After installing, I was able to use the terminal, but when I tried to access the server using the IP, I got a "connection refused" error on Chrome and Edge. I tried looking at a couple threads with solutions on the Proxmox Forum, but I'm not sure if I understood them completely.

If anyone has anything I can try, it would be greatly appreciated. Networking is extremely exciting and interesting to me, and I don't have to ask for help too often, but sometimes it gets to the point where it's needed. Thank you!