Maine’s public transport system is pretty sparse so mostly people end up needing cars eventually (unfortunately).

For yourself avoid cotton base layers in winter. Cotton don’t insulate if it gets damp. Wool or synthetics are better.

My winter layers are usually thick wool/alpaca socks, muk boots, base layer thermals and then pants. Shirt and sweatshirt/sweater under either winter down puff jacket or thick carthart jacket. Mittens and Winter hat. Also. Buff, basically a polar fleece piece that goes around your neck. If I am going out and wearing nice cloths for work or a party, I always have at least the outer layers and boots with me in a backpack or in the car just in case. Yaktraks/crampons are metal grips that help you from slipping on ice, they are helpful to have too especially when it rains then freezes.

Southern Maine has lots of fun indoor activities like Arcadia the arcade bar, roller skate rinks, bowling allies, your local library and so own. Learning ice skate, ski and snow shoe is tons of fun and helps you stay active!

In Southern Maine you can get away with some good aggressive all season tires if you get an AWD vehicle, i.e Subaru AND you become proficient with snow driving. You can never go too slow in the snow.