In the freezing winter air I wear a mask, a surgical mask because it heats up the air I breathe. And I have warm gloves. Eventually u could get a thermos that keeps hot drinks for a few hours to keep warm. I say I wear a mask but actually I wear two to bounce the air I breathe back in my mask so I don't breathe cold air. Because two layers are more isolating

Get high quality clothes, maybe wool and knits and stuff like that. There are these things in fashion called thermal clothes that goes under your normal clothes, I think these are made of fleece

i found out that taking a hot shower makes me feel better after i come from the cold. i waited like 30 min but i think i could have done it after 10 min after coming from the city uz i was going out and i came back and i felt kinda tired. so i took a hot shower and i felt better. it doesnt have to be super hot but a decent amount of hot is okay

I have some fleece lined leggings that are warm and probably warmer with thermals under them.

That's a very good idea! Thankyou!