Hallo there, Mr. Gamer.
I come to offer advice. I noticed that you were concerned about being unfamiliar with the setting used here. I once had the same concerns myself. In fact, I still do fairly often. Taking measures to explain why your character doesn't know the history of the world does seem like a reasonable idea for a cautious person who wishes to avoid committing canon-rape. But I can tell you that, with a little effort, you actually can still create a character that did not skip World History 101. Actually, letting your character possess the same level of knowledge that an average inhabitant of Gaera would possess will probably help you get caught up faster yourself. In fact, I would imagine that the more knowledge your character is meant to possess, the faster you will learn your way around, although I wouldn't suggest having him or her know anything that he or she wouldn't have a reason to know. But anyway, to find the information you need, just click the "Gaera Main" link in the description of the "Gaera Main RPs" forum. For reference,
this is where the link should take you.
Now, here's a suggestion for getting that first idea. As you look over the information, ask yourself "What kind of person would live in this world?" Given that there are probably an indefinite number of unique answers to that one question, once you have answered it, you will likely have found the basis of your own unique character. At that point, all that you will have left to do is put together a biography. It isn't too hard to keep the biography of a previously uninvolved individual from conflicting with canon as long as you research the places where he/she has traveled and avoid making up new places. If something does happen to conflict, somebody will probably tell you and you can fix it.
Anyway, that's my advice. By doing it this way, you'll not only absorb a good deal of knowledge, but you'll also find yourself in possession of a character entirely of your own creation, which is more rewarding. This is a dramatic concluding sentence.