In one of my favorite Alternate history shows For All Mankind, the first fusion reactor was created in 1986 and thanks to the discovery of a huge pocket of Helium-3 on the moon Nuclear Fusion technology develops more rapidly and it is more widely available than it is in the original timeline. And as a result, there is a decrease in fossil fuel consumption. However, it also resulted in a lot of workers in the fossil fuel industry getting laid off and after looking at another post it got me thinking.

Even if we do develop nuclear fusion technology, it's not going to be adopted overnight. We are going to come up with new infrastructure and logistics in order to make it all practical and if we ever evolve into a space faring civilization its only fair that we focus on colonizing parts of the solar system that have resources to help us sustain our fusion technology.

So what are the necessary infrastructure and logistics that we need to make this technology practical, and which parts of the solar system should we mine in order to sustain this technology? (Besides the Moon)