Advice for kids sharing a room?

I'm ready to move my infant out of my bedroom and into her own space. This means setting up a crib in our home office, or, putting her in with her 2 year old sister.

Both kids sleep through the night, but (as any parent knows) they'll both whine a little here or there when they end a sleep cycle. They have brief moments of noise-making before falling back asleep. (They go to bed and wake up around the same time, so that's not really a concern of mine.)

I THINK the infant will sleep through the 2-year-old's noises, but I don't think the 2-year-old will sleep through the infant's noises.

Has anyone put an infant in the same room as a toddler and has any advice?

PS - So excited for Vanderpump this week lol