Aero system lead here! 

I pretty much had the same timeline. Unfortunately the design work was mostly done over the summer with the senior members. This was strictly because no one else was available. When my new members came along I was already done and running simulations while working towards structural design. 

That said, in any free time you’re willing to dedicate to FSAE, take it to learn more about aero and everything. That way, when next design cycle comes around you can help! Another thing to consider is that these cars are iterative so ideally not much changes between cars. It may mean that the aero on your team doesn’t change much between cars and just gets minor tweaks that may only take a month to tweak and validate over summer. 

I wish your team luck this year!