I think if you want to start writing you should learn how to use;
1. Capital letters. Your 'I's should have capital letters, the way I was taught this was: 'Capital letters are important, so use a capital letter for 'I' or you're not important.'
2. Punctuation. Your story doesn't flow very well, and if I were to read this out loud I would hardly ever get to take a breath. Lay out your sentences carefully, and while learning to do this read out your sentences before you go to your next one.
3. Spelling. Not much I can say about this, but I will correct your errors in my remake of your story below. ( Without adding description. )
4. Description. Again, without description your story won't flow as well as it could. You should tell us about why you had 4 hearts, how much iron and coal you had, how large of a fall you fell, and how long you had owned the game.
Here is your story;
"So today I'm talking about a nooby thing I did. So I'm in a ravine, I've collected a bunch of iron and coal. It's pretty early on in the game, I have 4 hearts and I see a creeper. I obviously want to kill it so I can get gunpowder, so I jump down from a really large height and kill myself. I totally didn't expect it. Then I rage quit." Enjoy.
I'm one step closer to fixing the internet! The story may be worse than the first one, but I wasn't there and I didn't know any extra facts. I also rearranged some of your sentences and took some out.