The upper body is too bloated, and the lower body can be balanced by wearing narrow pants and snow boots.
Personal experience thermal underwear is deceptive if it is not thick. . .
Don't wear too loose inside, it's not easy to get cold.
A fitted cashmere sweater can be worn with a simple and lovely cardigan with long sleeves. It is easy to put on and take off according to the temperature, and it looks good without a coat. I suggest you wear a thicker coat outside. Practical. Now there are many styles of thick coats to choose from besides down jackets. LZ, find them.