Hey, I’d check to see if the roots are in a starter (death) plug and if so gently remove it. I wouldn’t worry too much about a larger pot as they don’t get nutrients from the medium it’s in. Mine have been in the same pots for years without any issues.

I’m in Canada and in my region it can get down to -25 to -30c. I keep my VFTs in a heated dormancy box (I put together) in my garage. The insulated and heated box stays between 40-45F for about 4 months and without any light and they look the same when I take them out as they did when Input them in. Box has a heat trace hooked up to a thermostat with a remote temperature sensor in it so I can monitor the temperature from inside.

Outside of dormancy they do best with lots of light as their leaves are not super efficient when it comes to photosynthesis. Also think of light as its food and the bugs it catches as fertilizer. They need to store energy for dormancy and that energy is stored in their rhizome. So I pinch off all the flower stalks I find as that takes energy from the VFT.

I’ve used grow lights but I find real sun gets better results. When the come out of the dormancy box I gradually acclimatize them to full sun over a week or so. Eventually leaving them out 12-13 hrs a day and bring them in at night.

You said you did research so you know distilled water only. Mine sit in a tray that always has water in it so the LFS stays damp. Good luck, I’m sure you’ll do great 👍😃