Why was the starting point at the main base of the first level instead of in the city?

There was no need to think hard about it.

That location was simply the most suitable for moving together.

If we gathered in the city, we would just scatter once we crossed the gate anyway.
With my teleportation ability, if physical contact was maintained, we could transfer together, but there was a limit on the number of people.
If more than 40 of us held hands and tried to move, we would still end up breaking apart.

However, gathering at …