I am new to the game, as well, and what scared me was the complex (yet awesome) interface to things.
One suggestion would be a very, simple "interface FAQ" page with little labels as to what could be done or what to consider. There's a LOT of stuff to click on, so not everything needs labeled, but the important features outside of the left-most buttons (map, equipment, storymode, etc) were unknown to me without someone specifically pointing it out.
One example of this is, because all the good info was on the main screen, it took me at least five days to notice the teeensy [b]header[/b] with Announcements, Adventure Log, Forum Link, Free credits, etc. That's not scary, and now I'm glad it's so unobtrusive, but it was something I didn't know at first and upset me I didn't see the links some help-folks were mentioning to look at.... A static image-page of "The Game Screen" with highlighted regions and arrows/labels, "Header!", "Player Info", "Chat panel", "Players here", etc. Nothing too fancy, but just pointing out the general layout and ImportantStuff(tm) for us visual-learners. The "Game Intro" link is great, but does not mention the Player documents, (hatelist, Quests, etc) at all, which are apparently important to know?
Examples: [b] The yellow/orange "recharge creature Vitality".[/b] The help files mention it, but it was so small that I didn't notice it was "clickable" initially, and thought it was simply a visual "life bar", and kept trying to click the actual creature image (which shows detailed stats) and searching for the "Recharge Vitality button" from that screen. Perhaps because I was looking for something else, or maybe the fact that my tooltips seem to not always appear, I had been looking at the wrong page.
[b]The K documents, Hatelists, Quest docs, and such. [/b]
I also thought were simply "ranks/awards/badges" under the avatar's image, and hadn't considered clicking on them. Mouseover for those (to me, at least) does not show a popup tooltip info, so I ignored them until about hte tenth time I heard "Click their Q document" and realized the teeeensy little scroll had a Q on it, not just some symbol/rune. (this could simply be too big a screen resolution and poor eyesight on my part, but was still confusing)
[b] The realization that not all players here play in-character.[/b]
I had been asking around about the alliances, and heard more than half of the replies either state "Sorry, I don't roleplay" or "Ask the king", and such. Or flat out "I don't know, just fight until you can get to MP4". That was an odd answer.
Other than going to the forums, I've had difficulty finding HOW to message the kings of those lands, because in order to message someone in-game, you need to have seen them in-game (or at least had them walk through a region to get their name-link visible?)
Relatedly, the forums seem to be an extension [b]OF[/b] the Magic Duel lands, rather than an OOC community to support "The Game", which is how I view most other game forums. I wasn't quite prepared to be default-expected to go get all my info in the forums, particularly about in-character questions. I had avoided the forums because I assumed that since most information is considered "to be discovered in game, and not via spoilers", that the forums would not be a safe environment to go digging too deeply.
(this is not a complaint about the spoiler policy, I love that! It's different enough from other games and sites that I intentionally avoided the forums in order to not break immersion as much.. which seems to have been wrong way of viewing the forums)
Otherwise, I love what I've discovered so far! The items above are mainly little things, in the general picture, and probably serve to help filter out those who may not "get" the style of game this seems to be, and were looking more for your classic "kill things, get XP" type of webRPG.