Looking to get into cycling this winter and first triathlon next summer.

I understand these questions may get asked daily and be redundant, I am willing to learn and research feedback that's given. Please go easy on me! Haha

Looking for guides and ways to go about picking up a bike. This winter, I don't plan to ride outdoors much so I was planning on picking up an indoor trainer to use with Zwift and ride in my garage.

I've come across some bikes on marketplace and I'm unsure of which direction to go in and what make a good bike. For reference I'm 6'0" 165lbs.

-First option is a white+red Cannondale slice carbon 56cm for $800 – just recently dropped fork $950

-Second option is a black"Specialized Road Bike 54" frame" for $725

I know areo-bars are not for beginners. I'd probably take them off and keep them aside.