I did a COVID-isolation week that included Rockhouse, Disaster, Cartago, and Cathedral. In hindsight it was basically an indoor training camp. Anyway, that week was 1,000 TSS and I had been averaging 450-500 TSS per week heading into it. I found Rockhouse more challenging than Disaster, but I had been doing General Build and Sustained Power Build leading into that week.
If you want to work your way “up” to Disaster, there are -1 and -2 versions that you could try first. How is your fitness base? What is your longest ride indoors so far? Which workout was it? What is your nutrition plan? Which TR plan are you following?