When / how to introduce sleep routine?

[raligator]

My baby is still very young , only 4 weeks old, but I’m just curious for thinking ahead.

I understand the recommendations are for baby to sleep in the same room as you day and night, and at around 3 months you should be/already have established a bedtime routine such as bath etc.

Currently our little girl sleeps in the living room with us until we go to bed around 10 and take her up with us.
If we start to establish a routine when she is older, should we be putting her to bed in our room while we are downstairs or should she still be in the same room with us until we go to bed? It just seems like the routine would be pointless if that’s the case?

Thanks!