1. Probably the global new section, but it's a lot of work :)
2. You can't until you have enough STEEM POWER (500+, but i believe they want to lower it to 125)
3. There's a reward pool in the system, your share of that is calculated by the amount of STEEM POWER you have compared to the total

Visiting https://steemd.com could probably get you some more information you need. But it's very complicated.