Wow Summer18! How exciting!
When Eloise had babies, which were also a bit of a surprise, we just left her to it. Tried not to touch the babies unless necessary (e.g. to put back in the nest). Having said that, my research revealed that rabbits do not reject their young if touched by, and therefore smelling like, humans. So while we didn't hold them all day long, we didn't worry if we did pick one up either.
She was so good at looking after them - they opened their eyes after about a week and it didn't take long for them to start crawling out of the nest. They started eating solid food when they were ready - had a go at some straw and pellets. The only thing we were cautious of was to make sure that all the babies were being fed by mum. And they were - we just watched that no one seemed to be being pushed out of the nest etc. It's so amazing. I think you'll find that Wilma knows what to do - best to leave her to it unless there seems to be a problem, in my view, although I'm not a vet!
Hope all goes well - you'll have such a great time watching them grow! (Also hope you'll be able to post pictures one day!)