Tips on sibling room sharing

Hi mamas looking for some tips and advice!

Our baby boy is due in march and our daughter is turning two in may. We live in a 2 bedroom now and realistically will not move for another year when we save more money. We will have new baby sleep in our room until about 4-5 months old then move him over to our daughters room. Im not sure how this is going to work or how we are going to try and sleep train. I know baby will wake up at least once if not more at night until *hopefully* close to a year old. Any advice/suggestions!?

And yes we have thought about keeping baby in our room for a year but if we could move him over sooner the better.

Thanks in advance!!!!