I played literally a single Gwen game at some point, didn’t really enjoy it, but I learned that the thing under her health bar is her stacking her Q with auto attacks which makes her do more Q’s and it times out if she isn’t attacking anything.
Ever since, laning against her has become a lot simpler. I’m too lazy to do it, but I’m sure if I just played a single game of every champ I’d have similar revelations and rise up the ranks.
When I first started playing, I was too nervous to play against real players so I would always "warm-up in coops vs ai. After a while, I started winning “too easily” so I decided that I would use that warm-up game to learn new champions. Everyday I would look at the free champion rotation and pick one that I had never played. I would gloss over the abilities then play a bot game with them. A couple years later and I had very basic knowledge of every champion. I was then able to follow along videos showcasing specific mechanics about a certain champion. I would say that today, I probably know about 80% of every champion’s specific interactions