Am I screwed with my bike choice ???

I just bought a used Giant TCR Aero which is clearly labeled a TT/Tri bike.

When looking at specs of the particular bike, I was so thrilled with the equipment, I failed to notice the 73.5 degree seat tube angle.

I bought this bike specifically for Sprint triathlons ( my first one is on 6/25), and to ride in a full aero position as fast as possible.

I am fortunate enought to have several other bikes, including my favorite road bike, a Litespeed Classic with Ultegra.

Part of the reason I picked the Giant was that it had 700c wheels and Ultegra 9 speed, which means I could swap wheels, and other parts if necessary with the Litespeed.

I did not want to buy a similar road bike to what I have !!

Are there any other Giant riders (or others)on here who can lend some advice ?