There is nothing wrong with going to classes, to school, to seminars, to conventions and the like. Nothing wrong with belonging to "groups" both discussion and working. Pick up all you can.
I enjoy the feedback I get from a script writing team.
Just remember that most of the time the "formal" places are where techniques are taught. All sorts of techniques. Some would also say it is where opinions are taught as gospel, ... and with lots of examples to back up the message.
I say this. Look at the books you like, the ones you would like to emulate.
And just do it.