Transitioning baby from bassinet to crib


Our baby is four months and we are thinking to transition her to the crib at 6 months. Any tips on terms of what to put on or not on the crib. I read that a mobile isn’t good after 5 months on the crib. Do you use a mobile? A projector? Sound machine? We have a sound machine (hatch) that changes colors and we have the Sweet Dreams Soother by baby Einstein.