Do you think I will make JV? I'm a freshman...?

I think you have very good chances of making the JV or the varsity team. You could play all the way around or be the setter for your team. Keep practicing all of it too. Maybe work on your serving. You might be able to be a libero for the front or the back row if you are as good as you say you are. Maybe work on the approach for spiking if you want to be awesome in the front row. Another tip is to practice running and do anything like sit-ups to strengthen your core. Maybe work on your vertical jump if you are not good at that. Good Luck at the tryouts!!!!! = )