How I got over my fear of cold calling and trained myself to sell

Early in my twenties I had a complete career meltdown. At the time I was working in a job I’d come to resent with managers who didn’t support me and team members who were equally as fed up. I knew I wanted to leave but had no clue what to do next. So one day I started scrolling through the listings on seek.com and started applying for anything that looked vaguely relevant to my limited real-world experience, which at the time was operations and a bit of HR. 

A few months later I landed a job in agency recruitment; an industry that (as a total surprise to me) had a heavy focus on cold hard sales.