Northern "USAers" need some advice!

Briky <3 • Turning 30 this year 🙈 trying for our 3rd 💚

So I live in Georgia and I have my whole life. I've never been good with the cold. Anyway my husband and I are going up to Long Island NY for Christmas then up to Utica in upstate NY after. I've only been to NY once last year during August and there were no issues of course. What are some good ways (or things to wear) to stay warm but still look cute. I need to go shopping because I have like 5 (thin) long sleeve shirts and only skinny jeans which do not help keep me warm! I'd really appreciate any advice! Thanks!

Sorry if it's in the wrong group didn't know where to post