Question about temperature

My baby is 11 days old today and I’ve desperately been wanting to go outside and get some fresh air especially since I haven’t been able to see anyone due to covid. The only problem is we live in Florida and it’s extremely hot and humid here. I was thinking of taking her for a walk around 6-7am tomorrow when the temp is 75 degrees but she gets really warm in her car seat and it would still be really humid. Would it still be too hot to take her out then?

Also, I read that the ideal house temperature should be between 68-72 degrees. I live in a small apartment (only 600 square feet) and I leave the AC on 74-77. It feels fine to my boyfriend and I. I would freeze if it was any lower than 73. Is this ok?