Where can I find Glowstone in MineCraft?

My Nether portal screwed up and it just took me to a cave with only like 5 Glowstone Blocks. There's no more Glowstone and I need more. Wpuld I be able to make a new portal to Nether and end up somewhere else? Or will I just go to that same spot?

How and where to start gaming?

So I was wondering where I should start with gaming. The only game I have actually played was Kingdom Hearts and it was my favorite game a few years ago. Ever since then I stopped and haven't played a game. I also want to get into PC gaming rather than console gaming. My friends told me to try to play Minecraft but I haven't had the time to play it yet. I have seen a lot of my friends play GTA and it seems fun. I don't like any first person shooter games either haha. So any suggestions to what I might like or what I should try? It would be great to get some PC gaming tips as well!

What is a good gaming desktop?

Mostly going to used for League of Legends, but Minecraft too sometimes.
budget of up to 800$, and at least i5, 8GB and Windows 7 preferred but 8 is fine too. Also must be able to do school work on. Thanks for any help!

Added (1). BTW I do not want to build one XD

What biome am I playing in?

In minecraft there's a decent sized field with a small forest next to it, a big desert on one side and off in the distance is a swamp, also there are some big hills at one side of the map.

I'm addicted to Minecraft! Any tips?

So for me, Minecraft kind of came into my life as a distraction, or an escape, from the painful reality of teenage living. I realized I love the game itself so much, but I find that I sometimes play to pass time, when I'm bored, and have nothing to do, which is a lot for me. So for the days when I stay home all day, I'm at the computer on and off. I've tried to stop, and find other things to do. But I find Minecraft to be more fun. And because I have no siblings with me, or no one around my age, I sit in my room, trying to find solo things to do. BUT MINECRAFT IS So MUCH MORE FUN! I always go running right back to it. I know how I'm living is not healthy, but I can't seem to find any other ways to occupy myself. Do you have any tips or advice. I Really need help with this.