Congratulations on the new bike Marco. A couple of beginner options are the Ellwood Bluffs. Not a whole lot of climbing but the views are great and it's a nice place to get started. If you live downtown, Elings Park has some nice trails. There's some climbing, but nothing too long and various degrees of technical difficulty to work on your skills. For a nice, not technical climb, Romero Canyon is nice.
Have fun.
Have fun.