How can I dust my house and spring clean when I now have COPD?

I understand your need to spring clean, and your COPD limits. I suggest wearing a good dust mask, make sure there is good ventilation and get frequent fresh air.

https://ehs.msu.edu/occ/respirator/dustmask-vs-resp.html

If you wear Oxygen, make sure you have it even while wearing the dust mask.

Dont over do, take it slow, one room at a time and shut the room up for a while after it is done to make sure that the dust that is in the air has time to settle again, then go back for another light dusting.

Maybe this site will help you. It is how to clean your house when you have COPD:

https://www.healthline.com/health/copd/copd-how-to-clean-your-house#5

All great suggestions here. Wear a mask and try "wet dusting."

https://www.goodhousekeeping.com/home/cleaning/tips/a24221/get-rid-of-dust/

https://www.apartmenttherapy.com/the-new-york-times-ondusting-139412

Check with your doctor's too, see what they recommend.

As Naomie suggested, mask & wet dusting. I would add that you can get microfiber dusters that "grab" the dust rather than spread it back into the air. I bought a set and absolutely love them. The longest has a 12' handle so I can take it outside and shake it clean far away from me.