Fat guy newbie looking for decent bike....very beginner level road/tri bike.

No real idea what has inspired me to get into Tri's.

A co-worker went into the Dr with a cold, and came out with a bleak prognosis of a rare strain of lymphnoma. I had already decided on trying biking this summer by the time I found out about this. I was sick of bouncing around my living room to a video each morning and needed some fresh air added to the fitness of things. So I bought a bike and decided I would do a 150 mile bike ride in my co-workers name. I bought a hybrid, nice bike and does everything I wanted it to.

what it doesnt do is pick up a few extra MPH for the same effort.

Im 265 lbs 6'2 with 32 inch inseam so slightly long torso for my size.

Im not certain if I wanted a dedicated tri bike, or a road bike for dual purpose. I would entertain all offers.

Before someone asks, Im not 100% certain on bike size. Im figuring 54cm. I hope to get on some this week and get it a little closer. I realize it wont be a professional fit. But looking for something to get my into the sport. Relatively inexpensive all things considered. A 5 year old bike wouldnt matter to me, just something thats mechanically sound and ready to ride.

Im located in Central Wisconsin, would prefer to try the bike for size in person as I dont have all the stats I need.