lose anything in there thats made of cotton and replace them with wool, youll only need the jacket when its <25

key areas: feet, hands, face

if you dont wear glasses the cold air is gonna make your eyes tear a lot, and sucking in huge gulps of dry cold air burns your lungs, so having a scarf or bandana or something over your mouth to warm and humidify the air helps immensely

i wear wool mountaineering socks and my feet are still a bit cold in anything <20 after about half an hour, wind/waterproof booties will help that a lot

if the gloves you have arent cutting it try some lobster gloves, the less isolated your fingers are the warmer theyll stay when theyre essentially punching the wind the whole time

you want to be cold when you step out of your house but not freezing, the work you put in will keep you warm