Having a second baby

April • Mother of 3 ♡
I have a daughter already that is 15 months old right now and we just found out that we are pregnant again (were ttc). I am worried that my daughter may not handle it well though. She normally can pick up on things so I have been explaining she will be getting a brother or sister that she will be able to help with (because she loves to 'help' with anything. Cleaning, going to bed so I can work on class stuff). I also bought her a baby doll for Christmas and want to get her a play baby bed to kind of get her ready. So my question is, for anyone who had babies and already had a toddler, what did you do to ease the transition and prepare them?