Do you just put them in the crib when you know they're sleepy and let them fuss and cry until they fall asleep?

My LO will be so sleepy but not totally asleep and I'll put her in the crib and she starts worming around and kicking and fussing. Most of the time, she ends up screaming her head off. She's 8 weeks and I don't know how to get her to nap without having to nurse her or have her nap on me after she nurses to sleep. When she does this, I transfer her to the crib and she's not having it.

She won't take a paci anymore so I guess she doesn't have a way to self soothe...Am I expecting too much from an 8 wk old?