Advice / opinions about paid nursing assistant training class?

I’ve only worked as a hostess / server 3 years ago bc I’ve been a stay at home ever since but I’ve been looking at jobs & I’m actually interested in caregiver jobs & the interview I have is at a senior care home which they can certify you once you finish the program . Is this worth the shot ?! Idk how to prepare myself I’m super shy but at the same time I’m not so idk what to expect .. have any of you ladies gone through paid training before ???