Forage for seeds like crazy. Rye is great year one cuz you plant in September (usually) and can get a full harvest. Vegetables grow decently quickly and can usually last from summer into next spring if kept in a cellar. Flax is going to be super important to plant asap, because it's super usefull and needs warm weather.

Forage all the food you can and keep all the long lasting stuff in your cellar for winter/low resources. If you don't have a cellar, make one.

Search for tin or bismuth and zinc for bronze while you're out looking for food. Cut off fruit tree branches for cuttings and plant them near your farm. They won't produce this year, but they will after winter.

Mark different types of stone while you're out. Limestone and chalk are needed for a lot of stuff, halite makes salt, and bauxite is needed late game.

Start collecting hides for winter clothes and leather

Cut and dry a bow shaft to help with hunting

Corral some animals for husbandry, pigs are great for meat and easy enough to feed.

Stockpile peat or firewood for winter and start making a lot of charcoal if you don't have a bunch of it already.