What was the first time you felt competent in PoE?

From first time reaching maps to killing your first Uber boss. From your first home cooked build to trading for your first mirror.

What was the first time you, maybe erroneously, felt a little bit competent in this game? Which league? Doing what?

For me it was in SSF Standard killing Uber Elder deathless the first time. I think it was during Legion league with an Icicle Mine Saboteur. I started playing two leagues before...