What to grow in polytunnel?

At the community centre where I volunteer, I’ve been tasked with growing some vegetables over winter. There are 4 raised beds roughly a meter squared Zone 9a.

I’ve done some reading and understand that beans, garlic and onion are good places to start?

I’m just looking for any advice for the best/easiest things to grow? Or the best resources to learn from.

While I’m definitely a plant person, I’m an indoor plant person, so I’m nervous on where to start with these and the immense pressure of potential failure 😅

Thank you in advance! 🌱