Website in IIS locally and Domain Name bought from GoDaddy - What Next

I have been at this since last couple of weeks. After tiring efforts leading to nowhere, I am posting here.

I have a Website built and hosted in IIS locally. I just bought domain name from GoDaddy. I have my computer's public IP where the website in IIS is present. What are my next steps so that I can keep my computer as server and link with domain name? So that website is accessible publicly through domain name.

I saw a lot of posts with Web Hosting in Azure or other places, do I HAVE TO buy and host to make my site public?

I am a novice website builder and have very limited knowledge about this. Any help is greatly appreciated.