Alto player learning bari as a secondary instrument
I am a high school freshman, and I have been playing alto sax since I was nine years old. I am the only freshman sax player who was accepted into my schools highly rated symphonic band. During the second week, when it came time to select a bari player for this season, none of the other sax players wanted to do it. Me, being the freshman, was selected by the director to do it. Fortunately, I still get to play first part alto in our school's jazz ensemble, but for the next six months I will be playing a bari sax in symphonic band and I would just like some advice and answers to some questions:
How long do you think it will take me to learn? (The sax I will be playing on is in the shop for the next couple of weeks, so I will only get about two weeks to learn how to play and learn the parts before the first concert)
I currently play a 3.5 alto reed, and I am going to switch to a 4 reed soon, what size bari reed would you recommend for me?
Do you think that playing the bari will help me become better at my alto?
I would really appreciate your advice and answers to my questions, thanks!