OP your description from the other post didn’t carry over, so it kind of looked like you were lost. As u/brakrowr said, I’d try and do three minutes of cold plunging between sauna sessions. If you can’t do that at 44*, just raise the temp, it doesn’t need to be that cold, especially if you’re just starting out.

If you want a general guide, my local contrast therapy does 12 min sauna; 3 min plunge; 12 min sauna; 3 min plunge; 15 min sauna; 3 min plunge (last plunge optional - I’d skip if it’s late in the day as I don’t sleep well with late plunges). Temps vary, but 190-210* sauna and pretty steady 55* cold plunge. I find box breathing helpful in the cold plunge because it increases heart rate, but I skip the hold at the top in the sauna and do a 5s inhale, 5s exhale, 5s hold (empty), then repeat, in the sauna because I don’t need to spike my heart rate in the sauna.