Same as following musicians or authors: subscribe to communications.
Film festivals tend to be annual; the successful ones, at least. Get on the mailing lists for the festivals that show the sorts of films you're interested in so you get their schedule next year before the festival starts.
Follow content creators who follow the film festivals and films you tend to like. YouTube, blogs, podcasts, whatever. Even the festivals themselves often have social media accounts you can follow.
There's more to know if you plan to drive a car.
Four-wheel drive helps to accelerate in icy conditions, it does not help braking.
Make slow, careful changes when it's snowy or icy. Slow down more than you normally would to take a turn. Give yourself triple the distance to slow to a stop. Don't turn hard.
Use windshield wiper fluid appropriate for freezing temperatures.
Put any rage or impatience aside and get to where you're going safely.
If you live in a place that clears the streets and you don't have to go anywhere, consider staying put. Wait a couple hours until the streets are cleared.
If you'll be driving somewhere more remote, have clothes and boots appropriate for the weather in case your car breaks down or gets stuck and you have to walk. I also keep a jug of water, flashlight, and blanket/sleeping bag in my trunk during winter for this reason.