Excuse me, what is the difference between tourism and immigration, immigration and entering the house? Help me see which one to choose in this situation.

Travel means: stay where you are, go out to play and come back.

Migration: moving, referring to the process.

Entering the house means that you have moved and are going to live.

Since the decoration is for living, of course, we should choose the day when we enter the house.

Of course, strictly speaking, neither is suitable for you to go home. It is closer to emigration.