Is it a must to attend Pre-natal Classes?

Hi mommies, I am a first-time-mom here currently entering 2nd trimester. Heard from some of my friends that it is important to enter pre-natal classes at hospitals to learn about how to take care of newborn baby, how to differentiate the diff types of baby cries etc etc. May I ask if these paid classes are a must to go? Can I survive with just youtube tutorials? 😅 I am also hiring a confinement nanny so she will be teaching us, right? Currently very tight on budget so I am wondering. #firsttimemom #advicepls #firstbaby