One absolutely sure way to be fearless is to speak the truth at all time about everything.

The most risky liability of your life is 'the unspoken truth'.

Temporary extreme fear while saying the truth is easy to overcome than the perpetual fear of the unspoken truth.

Fear is involuntary, courage is voluntary.

Talking to strangers is very panic fear, to be fearless and good communicator in long term try talking to strangers with courage like you already know them.