1. You almost always get the spotlight.
As a solo instrument, the violin section almost always gets the melody part in an orchestra, or in any combination of ensemble. That is because the violin has a higher pitch range, and it is much easier for the violin to stand out in a group. It is a no brainer for composers to let the violins play the melody.
2. You won't sound like the violin in your favorite music video for a long time.
You WILL hear some scratches and nosies when you first start on the violin. It is completely normal. It could take you days or weeks, but once you have found the perfect balance of weight using the bow, you are one step closer to playing your favorite song.
3. Your fingers/arm/shoulder will get sore.
This is the first thing I tell my beginning students, and my solution is---GET OVER IT. The violin position is unnatural, you can not find one activity in your daily life where you turn and lift your left arm for an extensive amount of time. Your left hand fingers will hurt from placing down on the strings. There is no way around it, but you will develop calluses over time, and you won't feel a thing by that time. However, if a student complains about pains in unexpected places or the pain won't go away, there is something wrong with his or her posture. Be sure to ask your teacher about it!
Welcome to the violin community! You will love it.