The content is very well-written by some great authors who have worked within this industry before. I think that it's not enough just to read about what you're doing wrong - there needs to be an explanation as to why your approach isn't working so far. It can sometimes feel like reading through someone else's notes when they've been trying something out themselves! For example, if you haven’t done any prospecting or cold calling then how do we know whether our message has resonated? If you want to improve at selling but don't understand where/how things go wrong, try taking one module (or even all) of the courses available here first. Then come back after having put into practice what you learn, using feedback forms etc., and see which modules will help address those issues best. There aren't.