🔐 The first clue

I hold people inside,
but no one wishes to stay.
I close doors,
yet this is where your quest must begin......

 

So tell me: where does the City Quest start?

Only open a hint if you really need it

A nudge

A = 1  Z = 26

 

The numbers you need are:
16 – 18 – 9 – 19 – 15 – 14

 

Turn them into letters, and this place will allow you to begin.