Help! how can i get my 7 week old baby in a routine?

Like you said, all babies are different. But, if you arent still doing it, I would suggest to keep swaddling the baby, wrap her up real tight light they do in the hospital, that has always helped mine sleep well. And during the morning/daytime hours when you say she settles easy, keep her awake, play with her, talk to her that way when evening comes she's extra tired. I would try that for a few days and see how it goes. Keep her up and awak during the hours you want her up and awake and put her down during the hours you'd like her to sleep. And when you put her down...swaddle swaddle swaddle!!! I swear by it!!! Theres a reason they do that in the hospital! They are comfortable that way! Good luck!!