The Central Galaxy was many Star Fields from the Shattered Star Ring. There were also many desolate universe belts in between. The distance was extremely far. Back then, even though EsGod's subordinates had taken an extremely fast high-grade spaceship, it had still taken them years to cross this distance in hyperdrive. Without hyperdrive, it would probably have taken billions of years.
The first stop of the fleet was the Inter-Star Field Stargate Station that the Crimson Dynasty had built in the Shattered Star Ring.
Inter-Star Field Stargates could tremendously reduce the traveling time. It was the one and only way to safely and quickly travel between Star Fields. This did not include natural wormholes.