You can used internet as a medium to learn all things that you want about bitcoin trading since internet is very accessible and easy to used all things are possible when you used this thing.
Yes of course internet is the best way for you to learn anything but i think the OP is talking about the destination , like which website or which group and that's an important thing .
If you got a good source of information you'll absolutely have good knowledges and good decisions in your trading career.