We might want to look for Helium-3 too, or refine deuterium (Hydrogen-1 is actually pretty useless for fusion.)
We need to grab that stuff before it floats off into space, maybe we should build some kind of grabber drone.
we could quickly make a nano-fiber net to catch excess material exiting from the mine.
While a net energy loss for the process, running the hydrogen 1 through a Farnsworth fusor (which might be doable with our current power source?) Would convert a decent portion of the hydrogen into deuterium and helium, which could be fed to a stellerator.
(One of the more useful roles of using a fusor is to run eg, water vapor through it, and use it as a source of soft neutrons that is easy to shut off. Putting it inside a tank of hydrogen-1 should convert a decent amount to deuterium through neutron capture, but will be a slow and power hungry process. Once the stellerator is on though, it just becomes a vampiric loss on energy production to run the fusor for fuel synthesis. Collecting excess neutrons from the stellerator itself for hydrogen enrichment and ditching the fusor might be more economical.)
https://en.wikipedia.org/wiki/FusorAnd
https://en.wikipedia.org/wiki/StellaratorRespectively.
We need water to extract fusion energy though, since we need coolant loops.
We need to get a sample of our overburden into our compartment for microscopy / xray crystallography. We can then get decent guesses about what we have to work with, and can make reasonably coherent plans.
Chondrite type asteroid should have most of what we need for water and fusion energy generation, but be low in metals.
https://en.wikipedia.org/wiki/ChondriteThey should be reasonably rich in hydrogen, oxygen, and light metals, like magnesium, but low concentration of iron or nickel. They frequently have pretty inclusions of olivine, and similar minerals.