If you want to develop the ability to speak with people, there is an organization called toastmasters which is intended to help people with public speaking.  That means to a group, so it's not directly on point.  However, the meetings are full of people who have difficulty speaking, and they practice on each other (or that's my perception of how it works, anyway).

There's a website.  I put in my zip code and ten groups within 10 miles came up.  (your mileage may differ).  They are also in many countries - there's a country drop down.

If there's a group  near you, you could try a meeting and just sit through it.  At a minimum, you should find a small group of people, any of whom you could approach to have a quiet talk about how difficult it is too speak to strangers.

Just a thought.

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