The link is a dimming tutorial. You must use the proper dimmer for the load type and it is straightforward until one starts working with an electronic transformer rather than the more common magnetic.
Some low voltage recessed fixture companies (not Juno) offer fixtures with either electronic or magnetic transformers. Dimming electronic transformer type fixtures can be very interesting and it is best if you can ask the manufacturer which dimmer brand/model is compatible.
I’ve seen magnetic transformers fail after a few years of being on a standard dimmer.