You did pick one of the most difficult races, Michiko. In fact when they started you had to be a veteran player just to make one.
Anyway! Welcome, King Aelle! Yes, most of the races are anime-ish, which is because much of the site is inspired by Anime, and most of the players have a love for it. However, not everyone is Anime-inspired, most notably the Nepleslians, as they are gritty action dudes derived from G.I. JOES (not a joke) and tend to have the least anime-esque elements in them.
It IS possible to make your own alien race, and actually there is a call for more species diversity in the setting, but before you do, I would suggest, as Michiko said, starting with one of the more Vanilla races (Nepleslians, Yamataians, or go Indie!) and getting to know the setting better. Once you know the setting fairly well, it makes it much easier to craft something that fits in and works with the setting. And also, don't be afraid to ask people, most of us are plenty willing to help. and of course, #stararmy on Sorcery.net's IRC server is your 24 hour source for instant or near instant help, as we have people from all over the world, there's usually someone on.