We’ve got one of those lingering around in the shop. It’s called “the stupid chair.”
Does building something count as first furniture? My first off-campus apartment, I got the little room, like it was barely big enough for my bed, which admittedly was a king size waterbed (parents got sick of it and I got it). So I built a loft where I put a desk and chair and some shelves for my stuff. That was the unfortunate house that became almost a frat. I may have told this story before, but one night I got back from the library and there was a rager going on. Some dude at the door tried to charge me $5 to get in. I took the wad of cash off him and used it to pay the oil bill.
First real furniture I bought was an unfinished dining table and some chairs that had once been used by operators at Ma-Bell, so…old. I just gave the last of those to my brother to use as a dining chair when his daughter comes to live with him for grad school next year.