The only way to get glass in Minecraft is to smelt sand in a furnace. Here's how to make glass in Minecraft.

Here is the recipe for glass in Minecraft:

Once you have gathered the necessary materials, follow these steps to make glass blocks:

Make a Crafting Table. Place 4 wooden planks of the same type of wood in each box of the 2X2 crafting grid. Any plank will work (oak planks, jungle planks, etc.).