Open these from the main menu. A check mark means you can craft; an X means you're missing something.
Forge (about 60 seconds): pick a tool type. Each plan makes the next rarity of that tool, using ore, wood, and essence in the amounts shown on the panel.
Cook (about 30 seconds): cooks one fish into a meal. Higher-rarity fish restore more energy. Eat meals from Misc, Meals.
Alchemy (about 30 seconds): uses bugs (from netting) and a berry to brew a potion that buffs a skill for about 5 minutes. Brewing again adds more time to the shared buff timer.
You start with basic starter tools. Bags and other extras appear as you progress — discover them by playing.