Tips for crate training?

I have this sweet, clumsy, floppy little girl I’ve had for 3 full days now and I am trying to crate train her. She’s about 9 weeks old and very sweet. I’m doing the training method of sitting with her by and inside the crate, but at night I’m leaving her in (because she’s not potty trained). She doesn’t mind the crate itself, she just hates being away from me. I’m also a student and have my end of the year exams soon, so on the weekdays I’m not going to be there 24/7 but my mom is helping. How do I make her love the crate while not hating being away from me? Also, how long did it take you to crate train your pup?