Adjeverb

So i have been playing this game for a while, and have just started wandering into PvP territory. This means i am a complete noob and I have no idea what i am doing whatsoever. So could I have some suggestions about what I should do in terms of becoming a PvP'er? Like, what should should i go for first, making a new toon built for PvPing or rolling out my blaster Fire/Energy and focus on making him do well?

All suggestions would be nice