FTM Pumping Bra Question

Okay bear with me - FTM here! I’ve tried to do research on YouTube channels with pumping bra reviews, but not finding my answers.

Due in early October, so trying to plan. When I begin pumping (especially looking ahead to when I am back at work pumping in January), do I need to wear the pumping bra all day as my bra, wear it over a regular nursing bra, or take the nursing bra off each time and put the pumping bra on each time? Wondering because I’m a teacher and have to pump in front of my teaching team at work when we are on our planning break.

Any suggestions on the best pumping bra? I have a Spectra s1.

Thanks ladies!