It didn't even take me that long. Probably 2 weeks at best after I really got digging. EW and chart patterns are the single best predictors in the micro level. I think fundamentals are superior for long term buying and selling. For the mid term my short and limited experience is that TA and fundamentals are both very effective.
I see TA as a measurement of sentiment. But the world doesn't run on feelings. Only the moments depend on feelings. It's kind of like hook ups and long term relationships. In the long run everything comes down to fundamentals. But on the short term "Game/PUA" works better than being a better good productive worthwhile human being,
At least that's just my personal take so far. I only started trading Aug 1st 2017.