I did learn from google,investopedia and youtube i studied technical analysis for about 3months which is why i have created my own trading style which is giving me a lot of profits,you should learn both technical and fundamental analysis because if not you are going to get rekt fast in the market because you are going to get fomo most of the time.
TA is useless for crypto in my opinion, I got burned a few times too often.
Learning how to trade in crypto = just doing it and learn as you go.