Either go to the vendors or the exchange and pick up a complete set of the weapon type you want to try. Don't worry about getting blue or purple, green is plenty good. Should be able to get those cheap (and maybe even blue or purple depending on the type) along with the related consoles. Don't worry about getting Mk XI or Mk XII. Green or white Mk Xs are fine for this.
Try them. If you don't like them. Try something else. Once you find something you like, begin investing in higher quality.
STO Forum member since before February 2010.
STO Academy's excellent skill planner here: Link
I actually avoid success entirely. It doesn't get me what I want, and the consequences for failure are slim. -- markhawman
Phaser > Polaron/Tetryon > Disruptor > Anti Proton > Plasma.
Why? Phasers have obviously the best procs.
Polaron/Tetryon both drain some stuff from your ship, practically its basically about the same end effect.
Disruptor -10 debuff, not better then Tet/Pol but still better then AP. Although that -10 is really hardly noticable at all. (Hull resistance debuff)
Antiproton +20 Severity. Negligable since all available weapon mods for AP are with [dmg] mods anyway. That would mean they would do a few DPS more then a different weapon type with CrtDx3 mods. Also u cannot use these with 2x or 3x Accuracy on any of them, perhaps 1 that might have 2x acc, but thats it.
Plasma? About all good shields reduce its damage by 20%.
These are the facts on Weapons in PvP. If anyone tells you otherwise, they are in error.
First off AP dose have a (acc)x2 mode I have 3 turts that are (acc)x2 (critH) that have that cost more then I want to admit and further more there is a (acc)x3 AP I've only seen it on a DC before and I've never seen it on any other weapon well ever but they do exist.