Sorry to say, but, my advice for today's wannabee copywriters is DON'T read any of the classics or take any class, BECAUSE, you'll pick up conflicting and confusing HOW TO.
Sure if you are dead set on becoming an A list 7 figure copywriter, by all means and endless nights study, write, tweak and study some more.
But, if you just want to earn a living writing copy, here is some heresy for you:
the more you read, study and learn...the worse you will become unless you stick with it through some very Ramen and Peanut Butter times.
We like to speak from experience here, and I've long argued about the anecdotal stories of success, whatever that means to you, because what YOU did or he/she did is NOT transferable to anyone else.
Over and over, year after year, I've worked with people who struggled with writing copy for their own products because they knew OR were familiar with some copy guru's formulas, and there are what, 27 different formulas????
On the other hand, I've had some students who didn't even know what copy was and they became much better, and started to make money much sooner than those that had taken courses .
to be continued
Sorry, some glitch with forum. But anyhow, here is my advice for MOST of you, the ones who want to make money from writing copy, and aren't interested in becoming the next guru...
Write quickly and throw your promotions out there and get feedback in the form of sales or no sales.
Get any sales, you have a start, a baseline to grow from. Too much OVERthinking, over analysis and some pretty stinkin thinking.
I do suggest you start with Colin Theriot (NOT affiliated) at FB, and ignore any and all further study of past greats, old masters, classics, and start selling something as soon as you can.
Copy writing is fast becoming a cheap commodity, cash in while you can. Or not.