Open a Brewing Stand
Place Blaze Powder in the fuel slot
Add Water Bottles to the bottom slots
Add Nether Wart to make Awkward Potions
Add Magma Cream to make Potion of Fire Resistance
Add Redstone Dust to extend the duration
Add Gunpowder to make it a Splash Potion of Fire Resistance
Add Dragon’s Breath to make it a Lingering Potion of Fire Resistance