Tomorrow us our first day outside my LO is 12 days old and the temp is supposed to be a high of 17 or low of 10. How do we dress baby if he's in a long sleeve onesie pants socks and a hat will a warm blanket and a car seat canopy do the trick or does he need something warmer I have a fleece like suit for cooler weather but not sure if it's still too warm for that. FTM here and not too sure what to do.