Ambition is good, never give that up, but also being aware of the scale of projects is probably more valuable. If you just picked up the software, I don't think any of the folks on here have ever said "Make your dreams a reality! Go for it!", usually (and in this case, my own personal advice to you) is to learn the software first by making a couple of smaller games.
I've always said this is one of the most welcoming communities I've ever participated in, so feel free to use this wonderful resource to help you learn more about the engine while you make smaller games. Once you have a couple games under your belt, you can take all of that knowledge and execute on your dream game.
On a similar note if community, while it's not impossible to find team members for your project, I would say it's highly unlikely. We don't know who you are, how much commitment you have to this project, what we will get in return (if anything), or anything about this project besides getting paint brushes. We don't even know what genre it is.
Anyone who does say they'll help contribute to this project on such little information is likely not going to be a helpful member to the team, and may only contribute to the project short-term before ultimately dropping it, which may potentially cause the project difficulty maintaining traction.
Anyways, best of luck. Start smaller.