90% of parenting is just being there. You have to show up and most everything else falls into place. Get lots of diapers. Don't give them alcohol or drugs. Baby powder. Wipe front to back and always put the baby onto something in case they blew the diaper out. Be kind to your sibling when you get tired and frustrated. Be kind to yourself. A trick that worked to get my child to sleep was gently tapping between the eyebrows. It made them blink which if they are already tired can help speed the process along.