Key to warmth is "dry" dead air between you and outdoors. More is warmer. Your body heats up inner layers. As long as you don't allow wind to blow heated air layer away, you will feel warm in most any temp.

Rest is details....

A wind proof Winter coat is needed. Hooded is better. You will still need snug fitting hat for your ears too. Especially if your blood is thin from tropical area. I like synthetic insulation like Thinsulate. Windproof polarfleece feels warm also. You can tell if fabric is windproof by holding up to your mouth and blowing through it. If you feel airflow on other side, then not windproof.

Mittens are warmer than gloves, if all other variables are equal. Try them on. Don't buy gloves online.

If you don't want to but new, check out thrift stores. Lots of llbean stuff in Maine.

Layers of clothing is important. Especially layer against skin. Don't wear cotton. Really.

Managing moisture is needed, especially if you are exerting yourself. Pit zips are great. Zipper front is good. I avoid pullover stuff like anoraks and sweaters. Vest layer is great way to manage moisture and keep core warm.

Smart wool socks over polypropylene liners are good. Avoid tight fitting boots or gloves. You need blood circulation to keep appendages warm.

Sorry if overly explainy. I lived in southwest and was surprised how many folks didn't understand the basics that I grew up learning in the east.

Enjoy Maine winter activities. THE WAY LIFE SHOULD BE. It says so on the sign!

P.s. drink water even if you are not thirsty when exerting yourself outside. Winter air is dry. You lungs are an increadibly efficient evaporator. You can dehydrate quickly. End of psa.