I have a 2013 Diamondback Podium 3. Is it possible to use it as a touring bike? I am new to bicycling and i don't have a clue as to what is necessary for a long distance bike trip. I am not sure that the Podium Three will fit my queen sized mattress. Most of the racks available will only hold up to thirty pounds and my TV weighs at least that much.  Should i get a bike that is better suited for longer distances with more weight, or should i just try to modify my current bike to fit the purpose.  

P.S. The Diamondback Podium Three is hydro-formed aluminum frame with 105 components(10 speed cassette). it weighs around 20 lbs and is classified as an endurance road bike. It has no mounting points for a rack.



i am also kidding about the tv and mattress.
This bike is a poor choice for any touring where you have to carry things (if you're doing a supported tour, you may be able to pass with it). It doesn't have rack+fender mounts and doesn't have particularly tough wheels. 

Depending on the type of touring you're doing, you should look at some touring bikes like the Surly Long Haul Trucker or Trek 520.  Typically, these are made of steel (repairable), have lots of rack and fender mounts (so you can carry stuff and not get wet), bar end shifters (simpler and less prone to failure than brifters), a wide range of gearing (so you can tackle hills efficiently), tough wheels (36 spokes typically, so they don't break), good tire clearance (fat tires = more weight carrying ability and nicer ride) and a relaxed geometry (so you're not in pain after a long day of riding).

The bike you choose (and how you modify it) for touring will depend on the type of tour you plan to do. But generally, you need to pack light.