6 week old sleeping issues

So I probably have the best six week old ever she never fusses and is the most calm baby I got really lucky but at night she seems to be fussy and can’t sleep more than a couple hours at a time when during the day she will have no problem taking a three or four hour nap at least. Does this sound like she has her nights and days mixed up? I’ve been Trying to put her on a schedule but how early is too early for a schedule? It just drives me nuts that she can sleep all day but then when it comes to be night she Can’t sleep more than a consecutive couple hours. Everyone told me to try to keep her awake during the day but I have no clue how to do that because she acts like she is so tired. If anyone has any advice for me or is going through the same thing please reach out I need help LOL