I’m considering that as well and got some tips from here:
https://solar.lowtechmagazine.com/2024/12/how-to-build-an-electrically-heated-table/
So far my lower body is fine but in case it gets colder I have been keeping an eye out for excess waste roofing insulation in my area, which I would use for an under desk rig.
When you say your clothing becomes the chimney, that makes me wonder if I should surround myself in a insulated structure, unlike the link above where they seem to let heat escape around the legs.
And support Russia like a muppet? Fuck off you muppet.