For those starting out in Arduino, there are tons of resources to get better acquainted with the community and the types of projects you can tinker with.

I had this idea of building my own bicycle lighting system totally personalized, the lights would have the exact lighting ...

So you've already outgrown Arduino's most beginner-friendly board, the Uno, and are looking to move on to bigger, more exciting projects. In that case, the Nano family might just be what you need ...