When to Transition to Crib?

Daphne.
Hey mamas! My LO sleeps in a rock and play and pretty much hangs out there all the time when not playing with me aka screaming for no reason haha ... she's become a crappy daytime napper BUT has had the occasional 5-6 hour night stretches 🙌🏼🙌🏼... I know she can't be in it forever and I'm also going back to work at 8 weeks ... I've tried putting her in the crib during a day nap but it doesn't work since she's a crappy day napper unless I tank her up (breastfed). What are your thoughts or success/failures??