Tigg,
Welcome.
I'm really glad you are getting the CO detectors. A tragedy was narrowly escaped.
I'd add that 3 foot double wall section to my chimney stat, and I'd remove the damper. You surely do not need a damper with a 13 foot chimney. Your chimney isn't really long enough to get a good draft, let alone an excessive one. You want more draft than you can likely get with 13 feet. A better draft will get more oxygen to the fire, which will let it burn hotter, which will mean less creosote in the chimney, which will reduce your risk of chimney fire.
I'd be checking my chimney every two weeks until I was certain the chimney was not getting clogged with creosote. You don't even want a narrowing of the flue by creosote build up, let alone a blockage.
The one can lead to chimney fire, and both too life-threatening CO levels.
Split that wood fairly small, stack some in the stove room loosely and off the floor, so air can get at it from all sides, and turn a fan on it on high, running 24/7. That will significantly dry the wood pretty quickly. You could get a few biobricks or some kiln dried lumber scraps from a lumber yard or builder, and mix a little lumber or a biobrick in with your wood, to lower the moisture content of your firebox for a cleaner burn.
Very glad you have had such good and timely advice from Ray, and that your family is all well.
Thank you, Ray.
Good luck, Tigg.
Best wishes,
RIdeau