You won’t be able to upgrade your armor until the early parts of Chapter 2. Once you reach the Oilwell Basin region and can access the forge again, Gemma will tell you about armor upgrades. To upgrade any piece of armor, enter the forge and got to the Forge Upgrade Armor menu. Select the currently equipped armor you want to upgrade, and you can now select Upgrade. This will pop open a new menu where you need to spend Armor Spheres to add XP to an armor. Add enough Spheres that it levels
