I've always wanted to play an instrument that required some form of precision and that is portable. I'm so tall and lanky, however, that it's almost impossible for me to play violin (too small). I would love some advice/tips on how to get started and how to get into a symphony. I can already read tenor clef, and am used to reading several different lines of music at a time, so reading won't be a problem.
How to get started? Find a teacher. How to get into a "symphony"? If you mean an amateur orchestra, wait until you've studied the instrument for few years--depending on the orchestra. If you mean a professional orchestra, wait much longer. It might be helpful to know what exactly you mean by "professional pianist" and whether you have a music degree.
The best thing to do is study with a private teacher for a couple years. Ask around locally for recommendations on a teacher and be diligent about practicing. After a year or two, seek out a volunteer community orchestra and ask what their audition requirements are. Once you're familiar with the audition material, give it a shot and have fun. If you want to take it any further than that, you have a lot of time and study ahead of you. Good luck getting started, if you haven't already!