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-Like I said, using OpenSea to create an NFT will teach you nothing about NFTs except how to use their NFT creator. You don't get to customize things to your liking, play with code or contracts, and it's clear that it's an OpenSea issued NFT. It's not all that hard to issue your own NFTs without the help of OpenSea and you'll be much wiser and capable if you go through the steps to do so. There are plenty of youtube guides that walk you through the entire process of creating generative art to getting them published on chain all without the need of a 3rd party. I would highly recommend going that route instead and I think that your collectors would appreciate it as well.