Well, I don't think that using OpenSea to create an NFT will teach you anything except how to use OpenSea's NFT maker. In reality, most people could learn how to issue their own NFTs in a day watching some YouTube videos. It's isn't a difficult process and doing it yourself without using an intermediary like OpenSea might actually teach you something. Once you've learned what an NFT is, you can start to understand what's possible. Functionality will be the key moving forward. People have realized the "artwork" NFT scam was nothing more than creative fundraising.
Actually there's a guide from OpenSea to create NFT [1], it's really easy since it's only need few steps to complete. Usually some Youtube channels just repeat every words of the articles they took without explain anything that important. Nothing surprised because they just want to create a video in order to get monetized.
However since AI can be used to draw and in NFT there's no difference between AI art and human art, NFT is become worthless now.
[1]
https://support.opensea.io/hc/en-us/articles/360063498313-How-do-I-create-an-NFT-