So, I've always been the introverted guy that knew lots about tech and I seriously feel it's time that I learn something new, not a new programming language or concept... but something I'm very afraid of, which is to sell.
Is there any good books to it? How do I earn the courage to go a place, look awesome and end up closing a deal?
Thanks a lot.
Imagine talking to a friend or someone you know and finding a real need they have and simply recommending it because you strongly believe it would help them.
Forget "always be closing" just listen to people and see if you have a valid proposition for them. The most successful salesmen I've seen have had way more knowledge on the topic then their customers and have provided them with what was really necessary for them reducing wasted time they could have spent searching, while also explaining why it was logical.
Lastly, I think you should have good body language not to make people think you're a serial killer and after a few practice sessions you should be fine. You earn courage by doing the task itself, either in little chunks e.g. doing a bit more and more each stage at a time, or doing the whole task at once without breaks.
Best book I've read on sales is: Spin Selling by Neil Rackham