You play to the audience, moment by moment, picking up on and responding to every shift in mood. That's why we in communications advise those going for an interview or giving a speech not to over-prepare, not to have a set text or, worst of all, hide out inside themselves.
Those of all generations who have become isolated in cyberspace can't pull off that face-to-face interview. Actually they even blow the phone ones. That's primarily because you have become totally conditioned to interact with a screen - desktop, smartphone or tablet. Not with human beings, in all their complexity. You bet, human beings are like snowflakes: all unique. They are a idiosyncratic combination of wiring and experiences.
In short, your social skills have atrophied. You are not alone. That's why Tech Crunch launched a new column "#Love: Hacking Social Isolation." Here is an example by Dr. Christina Villarreal, a San Francisco clinical psychologist.
Okay, that's the problem.
Get Back with People.
This doesn't have to be a disruptive experience for cyber isolates.
It can be as simple as volunteering to walk dogs at the animal shelter. You will interact with the staff and with all the other folks walking their dogs. Lonely in Manhattan, I did that at the ASPCA.
Look up online the meeting places and times for any "open" (that means you don't have to be a member) 12-step meetings. Those range from Emotions Anonymous and Parents Anonymous to Alcoholics Anonymous and Gamblers Anonymous. The groups are very social. You can start out sitting in the shadows, mute. Eventually you will join in. Through the Speaker Meetings you will learn effective devices for speeches.
Get a part-time job in retail. You will be forced to greet, meet and help. The way to get that job is, on the interview, demonstrate super enthusiasm for the product or service.
Analyze what effective talkers say and don't say, their body language and facial expressions.
They are right there on the front lines. They may be cops, customer service representatives in the supermarket, property managers for your apartment complex or housing subdivision, financial planners or the admissions deans at the community college.
Integrate into your own evolving mode of presentation their best characteristics which fit easily with your persona. No, you can't be all things to all people. The classic read on that is Erving Goffman's "Presentation of Self in Everyday Life." Here is background information.
Practice. Practice. Practice.
Yes, apply for all kinds of jobs. It's best to start this process with those you don't want. However, you will probably get them since you will be beginning to change how you relate to people. It might not be a bad idea to take the job and practice your social skills in the workplace. Those tend to wither when we are unemployed. We get rusty in how to conduct ourselves with The Man, co-workers, subordinates, customers and vendors.
The good news is that since we are social animals it's not difficult to return to our normal state of being. Remember just about everyone was a talker, pre-cyberspace.