Info request: vermi-composting

I don’t know much about vermi composting, but I am thinking of giving it a go. Does anyone have a good resource, knowledge, or recommendation on where to start?

My thoughts were to get a couple metal grated waste baskets, a bunch of earth worms and put one in each of my raised garden beds.

Or should I run an experiment and do one bed and not the other?

What are its benefits? Downsides(rodents,possums for instance)?

Guidance is appreciated.