Welcome to the game! I'm sure you'll have lots of fun playing. I know I certainly do. Keep doing your best!

Wouldn't have guessed you were new to the game looking at the list. Pretty cool, i like this a lot.

Hey there, new Planeswalker! Always great to see new faces to the game! If you feel like spending a little more money, I would reccommend putting in dual lands in your mana base. Hissing Quagmire and Blooming Marsh (4 each) are the best dual lands for Standard. I would also reccommend putting in a playset of Aether Hubs for additional mana-fixing. Having the right colors for your spells at all times is incredibly important; getting color-screwed is one of the worst things that can happen during a game.

A really fun finisher is Torment of Hailfire. Cast this thing on turn 7 or 8, and your opponent will be in for a Hail of a ride (ba dum tss). I would run 1 or 2 of these to have a little fun. ;)

Also, looking at your sideboard, I think it could use a little work. A sideboard is the most important part of a tournament match; it can make or break a round for you. A good rule of thumb is 5 cards to deal with decks faster than yours, 5 cards to deal with decks slower than yours, and 5 cards to make your deck faster. I'm not very good at sideboarding with Black/Green decks (I'm a Blue/Red Control guy, myself), but some suggestions would be:

• Bristling Hydra: For control decks, Hexproof can be a real pain. Trust me, I've stared down the throat of three of these things at once. It enters the battlefield as a 4/3 for 4 mana which is already pretty reasonable. But paying the 3 energy it comes with to pump it up and prevent your opponent from killing it is REALLY, REALLY good. I would run 3 in sideboard.
• Blossoming Defense: This card also hates on control. Not only is +2/+2 for 1 mana really good, but it also gives your creature hexproof. I would run 2 in the sideboard to fill out the playset.
• Ambuscade + Prey Upon : Both of these are really nice against Aggro matchups, because you can take out an opponent's threat with your own without having to go to combat. 2 Ambuscade, 3 Prey Upon at most.
• Yahenni's Expertise: This card will destroy an aggro deck, or at least mortally wound it. It'll also cripple most midrange decks, as well. But, as a drawback, it might cripple you as well, but once it resolves, you'll be able to cast a creature from your hand for free. I would run 2 of these.
• Crook of Condemnation: Part of sideboarding is anticipating what your opponent will play. If you're interested in going to an FNM, go one night, but don't play- scout out what people there are playing, then build your sideboard accordingly. You'll probably see a lot of zombie decks, and Crook of Condemnation can eliminate threats from the graveyard, like Cryptbreaker or Relentless Dead. And trust me, you'll want those "GONE gone". Play 1 or 2 of these.

That's really all I can think of, otherwise this is a pretty solid deck. This is really impressive for a first build- nice job, man! As always, good luck, and welcome to the Multiverse!

-RedMulligan