The physical act of launching a website is kind of like changing the oil in one's car. It's SUPER EASY if you've done it multiple times, or do it every day, like a Quick Lube place or something. But it can be really intimidating, nerve wracking and even scary if you've never done it before.
And just like the possibility that you put the wrong kind of oil in your car, there's always the possibility that you look in the wrong spot for your DNS settings, which most times are hosted in the spot as your domain name, but not all the time.
Case in point, Cloudflare and GoDaddy. Your domain name and maybe even Webhosting, might be with GoDaddy, but your DNS settings might be with Cloudflare.
This video explains the how to launch your website if this is in fact your scenario.
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