Reserves while at university

Hi, I'm considering joining a reserve regiment for some experience and earn some money while I'm going through university. I've tried reading up on it and I understand it can work around your university schedule which is great and that you can't be deployed whilst you are still doing your degree.

I'm an astrophysics student at Edinburgh University and I'm curious how the training works, would I be expected to take time out of university before I can join the reserves and go, I think, every Tuesday and second weekend?

And as well how it works over summer holidays, if you get the holidays off too (I wouldn't expect to but I'm unsure) and if not if you have to stay at your location or you are able to do more training and gain more experience?