In your 'arsenal' menu, select 'mods' at the bottom of the screen. If you're struggling to stay alive, consider upgrading those using the next step in the Venus Junction requirements. Some common mods greatly increase your health, armour, and shields. Levelling up unlocks more mod capacity, which means you can install more stat bonuses. You level up your Warframe and weapons by running missions. The game will automatically apply a balanced loadout from the mods you've collected. Select 'upgrade' on the Warframe or weapon you want to outfit, then click 'actions' at the bottom and 'auto install'. To do this, in your escape menu on your Orbiter navigate to 'equipment' and select 'arsenal' to see your gear. In time you will be hunting down specific mods to make certain builds and weapons extremely powerful, but for now it's good to make a habit of auto installing them between missions. Mods are essential to powering up your gear, so it's worth learning how to equip them early.
