Standard - B/R Rakdos Deck

So there really is only one major Rakdos deck to be putting up good results these days.  Specifically, it's the Rakdos Aggro deck that was piloted to a victory at GP Santiago (just google it and you'll get the list).

That being said, I can see where in a friendly enough FNM some minotaur tribal deck MIGHT have a chance to at least do something (no guarantees).  If I were to piece one together, it would roughly look like the following:  http://deckbox.org/sets/526973. 

The first point you can note is that the entire deck is all of $56 to build, including the Blood Crypts.  If you were to cut them (something I wouldn't really recommend), you'll actually reduce the cost of the deck to about $22 to build.

The second key difference between my proposed build and yours is the emphasis on the minotaur tribal component.  Whereas you're sitting there with Goblins, Humans, Cyclopses, and whatnot, my build has only two creatures that aren't minotaurs.  This is important as you're trying to maximize the impact of your pumping effects through Rageblood Shaman, Kragma Warcaller, and Door of Destinies.

Third, and this is something you'll learn over time, for competitive decks, you really want to shy away from 1-off cards  unless they're completely optional and not required for your strategy but have enough power to win the game on their own.  Normally though, it's best to either up the count of those cards to improve consistency or drop them outright in favor of something that is more in line with your strategy.

Fourth, I would suggest scouting out your local FNM and possibly others at other stores before you dive right in.  I've found that there is an amazing amount of variation in how competitive FNMs can be.  Some places, they don't really care if you have proxies, encourage home brews, and people are there to have fun.  Other places, you run into a crowd full of kids who think they're the best thing since sliced bread and who think they're going to win the next GP, playing nothing but tier 1 decks and really not creating a fun environment for newer players such as yourself.

Anyway, I invite you to take a look at the build I proposed.  It's certainly cheap enough that you could build it and see how it performs without too much of a risk.  If you decide not to go that route, it's certainly fine too.  I hope some of what I've said helps.