You get Glowstone Dust from breaking blocks of Glowstone, you get 2-4 from each block.
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You make Glowstone Blocks with 4x Glowstone Dust in a square formation, on your crafting grid.
Glowstone is crafted by 4 glowstone (as shown in the screenshot) lined into a 2x2 box in the bottom left of the crafting table interface.
Its called a redstone lamp. It is crafted with a glowstone in the middle and four pieces of redstone around it.
look it up on minecraft wiki, it really depends of what light, whether it is fire, glowstone or lava.
to make a portal to heaven you need glowstone and put the water in it