First Ironman Bike Recs

What’s up everyone. I’m looking to do my first full Ironman this upcoming September 2026 in Maryland. I have experience as a runner but none as a cyclist. What bikes would you recommend for a first timer? Budget would probably be around 2k, looking for something low maintenance/ easy to take care of and a bike that’s optimal for my size (6’2”). Also- is buying a used one a good call to try and save $? I have been looking on FB marketplace but have also heard some bike shops will just sell used ones for an aftermarket price. Let me know !