Try out and see what your worms like and don’t like, but be ready to rescue them if you put something in they don’t like. There are several lists of things to use and don’t use and it isn’t consistent. So beware. If in doubt leave it out if it is for a veg patch. If it is going on a flower bed I’d say try it and see!
If there is a smell to the wormery it is not functioning properly and you’ll need to look at why. Check it isn’t waterlogged and undergoing anaerobic respiration, just get your marigolds in there and ix it up. Is it slimy? Make sure it doesn’t dry out as the worms need to be moist. Getting the water levels right in a big bin is harder than in a small bin.