Tips on my BW Heroic Deck

So very first thing, the link cannot contain a period at the end or it won't link to the deck.  So I'd be sure to go back and fix that in your original post.

Second, based on the fact you said you're new, I'm assuming this is just for casual table-top play with your friends?  Or are you planning on braving local FNMs with said deck?

If you're aiming for the latter, you have some work to do before it is standard legal as there are several cards that are no longer legal to use in the format.  Otherwise, the deck could function on the table-top alright once you trim some of the fat, so to speak.

A few tips on deckbuilding more generally:

1) You want to try to utilize creatures and spells to make a full mana curve that starts on the low end and then works its way up.  Typically you'll want to limit the number of high-casting cost spells (>4 or >5) to say 4-8 spells in a deck at most.  You'll note that even the most mid-range decks (don't be afraid to go look at tournament winning decklists as they'll help you learn what makes good decks) don't have that many high end threats as they're often just too slow to survive in most games.  So, that in mind you REALLY need to fill in the lower end of your curve.

2) Typically, you want to identify the core elements of a deck idea and stick to them as closely as possible, using multiples whenever possible.  So you normally will want to include cards as 2-4x rather than 1-offs.  So to that end, identify the cards that are central to your heroic theme and run with it.  Realistically this creates a whole list of cards in the current deck you can yank.

3) Sites like Deckbox are great for figuring out the ideal build for a deck, whether you actually have the cards or not.  Then you can "proxy" up the deck by just using basic lands that you've either written on or with sticky notes attached (pending you don't have a lot of basics to just turn into proxies) to see how the deck plays.  If you're playing table-top, most people are fine with this as you're trying to assess whether it's really worth it to pick up the pieces you need for the deck.

So, how do you move forward from here? 

First I would look at the full set of cards that have the heroic ability in your colors:  http://deckbox.org/games/mtg/cards?f=27aGVyb2lj!793.1.  This will give you a sense of the creatures you have to choose from.  Note that if you were to move into white and red you would have a very different set of options at your disposal. 

Then, once you've decided upon an ideal number of each creature, you can start looking into the various triggers you would want for heroic.  Specifically, the bestow ability was designed to do this and you can see all the bestow cards in those colors here: http://deckbox.org/games/mtg/cards?f=27YmVzdG93!791.3.

If I were you I would look at Hero of Iroas as the core piece of the puzzle and work around him as he will both give you a target for heroic but also will make the cost of bestowing your auras cheaper.  A few other cards I'd look into include: Chained to the Rocks (you can run Sacred Foundry and Blood Crypt to give you a few Mountains), Nighthowler, Eidolon of Countless Battles, Spiteful Returned, Ethereal Armor, Herald of Torment, Phalanx Leader, and both Fabled Hero and Agent of the Fates (which you already had).  These should make up the core of the deck.  If you're looking for a more aggressive build, Tormented Hero, Soldier of the Pantheon, and those sorts of things.  For a more mid-range build, you'll have to look beyond heroic to some of the format staples like Desecration Demon or Gray Merchant of Asphodel to really have that finishing power.

I hope some of this helps... I'd also keep my eyes peeled on TCGplayer's articles in the coming week as Craig Wescoe expressed some interest in trying to brew a W/B heroic deck.  He might end up posting a list that you could use as a departure point to work toward.

Good luck!

There isn't a single ideal mana curve, but you should have some number of one drops, perhaps a slightly higher number of two-drops, and so on.  It ultimately depends on your curve and the strategy of the deck.  Aggro decks will have much higher numbers in the low CMC, while midrange will be a bit more toward the 3-4-5-6 drops.