DD's only mildly less experienced than I am at RPing.
As a brief guide: this is a fully GMed RPG as opposed to a freestyle duel-of-the-ages type job; therefore the primary concern is to command your characters, mine is to unfold the world and story around them. DD, being very used to that game style, tends to give very blunt answers to questions like "what do you want to do?" and let me detail the results.
Your more prosaic stuff reads beautifully, mind - it's best to find a medium between DD's three words and your several paragraphs. The best way to make good posts but keep to a command-based setting is to do a good amount of first person writing as your character and ask questions of characters around you.
Also, while I know it's difficult, try and keep added information to a minimum except where it's backstory that only regards your character - if you name a pub for example, that's it named for everyone and (while in this case it didn't because I'm freestyling even more than usual) when I start building more detailed plots for you to explore I may need an area to look or be a certain way to allow the plot to move on. Equally, go for "I rush forwards, yelling wildly, and attempt to slice the head of my foul enemy from his Hades-forsaken shoulders!" rather than "I cut his head off and spit on it as it lies in the mud". The former is you giving a command which can then be fed into the rules, the latter starts taking over the GM's job of resolving the successes of player actions.
It's good stuff so far, I'll make a GMpost giving you more details when the others have checked in. Obviously the faster you all play the faster things can move - these things go exactl as fast as the slowest poster.
