That sounds like a massive project even for a team of veterans. As a total newbie working solo, you're just not equipped to make this masterpiece yet. Start with one, teeny tiny chunk of your grand idea. Like make a game where you just raise one creature (i.e. virtual pet). That should keep you occupied for a few months :P
There is no trick. Big studios spend years developing games like that, with teams of experienced artists, programmers, designers, and so on.