Breakdown of sorosoro dekakenaito, shiyakusho no madoguchi ga shimatte shimau.
Questions & Answers about sorosoro dekakenaito, shiyakusho no madoguchi ga shimatte shimau.
出かける means to go out or to leave where you are and head somewhere.
That makes it a very natural choice here, because the speaker is talking about starting the trip:
- 出かける = leave the house / leave now / head out
- 行く = go
So 出かけないと focuses on getting going rather than just the destination.
A rough difference:
- 市役所に行かないと = we have to go to city hall
- 出かけないと = we have to leave now / get going
