can try to let baby sleep with white noise. if baby is too used to super quiet environment, baby may be more distracted next time.
if baby keeps waking up crying, check if he/she is hungry or uncomfortable?
if baby can be patted/rocked back to sleep (assuming your baby is quite young like before 4M here), then it should be okay. you can slowly sleep train at later stage.
we never sleep train btw, and let our child figure things out himself.