I learned the hard way, pre internet and living fa fa away from areas where tea is pop.
So, much of what I learned was pieced together and pure trial and error (lots of error) and through self learning. I developed some BBH, bad brewing habits mostly from bad sources. One bad habit I did not pick up however, the very first green tea I ever bought was from RoT, "Sky Between the Branches."
The label said, pour boiling water over the leaves and brew for 5 minutes. The results were ... grossly predictable. But this taught me that there would be a lot of self learning through trial and error. Citizenship in the Republic of Tea did not guarantee good brewing!
Simple things confused me, such as I often wondered why they made some kyusu handles long which worked really well with how I was holding/pouring ... while other handles were really short and did not work for me. I was not able to figure this riddle out til Toru shared the 4 ways to grip a kyusu.
"ohhhhhh ... "
Finding TeaChat certainly helped a LOT. I had to eat some humble pie as I realized how little I actually knew.