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Can anyone point me towards a generic decklist for learning how to properly play this? I really like the idea behind it (and it's resilience to counters/discard) but am still learning about it.

Igri is totally right about all of that.

Dredge never seems hard to play, but it takes a lot of getting used to.  Learning what to name with a Cabal Therapy was one of the hardest things for me to learn.  (I usually name counters like Force of Will and Daze against blue decks, or Swords to Plowshares if I'm playing against white).  I would also advise you to play a lot of pre-sideboard games first, just so you get to know the deck really well, all of the cool card interactions available, and learn what makes a keepable hand, before you start trying to play through all of your opponents sideboarded graveyard hate.

Lastly, that list is very solid and is pretty close to my first list, but I would drop 1 Dread Return and add one more Careful Study .  Study is a priceless card in this deck.  While not being as explosive as Breakthrough , it works as draw and it can be used as a discard outlet if necessary. It also can make some unkeepable hands keepable by helping you to dig for a card you need.  Also, you'll find that 2 Dread Return really is enough.

Congrats!  Ive been really tempted to get a playset lately, but being a highschool student, I definitely can't afford them.  I guess I just have to play LEDless for the next few years......

Sun Titan seems really fun but it may be overkill, Im honestly not sure. As you said, youll figure that out through testing.  But other than that it looks really good.  I can't wait to see how it performs.

Flayer is probably going to be good enough. It reminds me of Stalking Vengeance , which I used for a while and was pretty awesome. It's more for the slow, grinding matches against a dedicated control or lock deck.

Brainstorm is actually a no-no in dredge because it doesn't discard. If your only spell to cast in your opener is brainstorm, you'll either have to DDD or mulligan. Those should be Breakthrough or Careful Study .

Your land count is light. First, you'll want to play four coliseum. It's the best anti-counter draw available. Second, you only use eight gold lands to cast Therapy and Looting, so you'll want to add at least two more. Tarnished Citadel is, believe it or not, the next best one considering the others' drawbacks. Undiscovered Paradise means you'll never get to activate coliseum turn two, which you wanna do. Forbidden Orchard gives them tokens to block with and when their tokens die, so do your bridges. Tendo Ice Bridge only gets one use. 

Intangible Virtue can go. It doesn't matter if your tokens are 2/2 or 3/3 when you have 12 of them. I see you're gonna combo them with Sun Titan, but it's unneccessary. You want your dredge deck streamlined, not cute.

Your black creature count is dangerously low for supporting four Ichorid. The fourth golgari thug should probably be added and maybe some Putrid Imp .

You have too many dread return targets. Sun Titan is for LED builds to get them back and cast looting again. You can cut him. Eternal Witness is for when you play a singleton metagame spell, like Nature's Claim or Firestorm in your 60. You can cut her. At that point you can safely cut at least one dread return. 

The probe has been used in the past. I've never tried it, so I can't speak to its strength or weakness. It is good with Therapy, that's for sure. 

Overall, I think your main problems are that you dont have enough discard outlets or lands.