Since you are interested building antennas, one of the most satisfying and cost effect aspects of hamming, I strongly urge you to purchase a copy of the ARRL Antenna Book. You will refer to it for years to come.
Two meters polarization conventions:
-SSB/CW/Weak signal work: Horizontal
A 2m dipole antenna (half wave) is probably a very poor choice due to several factors: hard to hang for FM work, other antennas are much simpler to build, gain antennas which beat the pants off it are easy to build or buy.
The simplest antenna you could build for FM work is a "1/4 wave length ground plane". You can build it with some solid wire and an SO-239 connector. Google that and you will find directions. (don't let anyone try to convince you on Jpoles. They are more complex, don't perform any better and tend to radiate signals down the feedline) "Why yes! I'm a ground plane man. How did you know?"
The formula 234/Mhz = element length in Ft. Gives you the dimension for the elements. Commit this to memory, and it will serve you well for years.
Use whatever connectors fit your radio/antennas, or are handy.
PVC is fine for work at UHF and below; many hams use it.