How can I make my newborn sleep well and star to sleep like us longer at night I mean? She is a lovely 42 days old baby girl

Sleep routine. Develop a great sleep routine right from the start. Try this: feeding, bath, a book (yes a book for a one month old) and a little rocking or singing. The body has wonderful built in rhythms, we just have to tap into them. Also note, that most babies do not sleep through the night until they are older than 6 months old. Most wake up at least once until then.