The Tormentor is an excellent platform for learning about PvP, and especially solo and small-gang PvP in low-sec space. The ship is frequently fit as a scram-kiter, with the scram and web modules used to keep frigate opponents 8 km away while the pilot hits them with bonused beam lasers. The Tormentor can also be fit as a short-range brawler with pulse lasers, though it is not as tanky as other frigates that are commonly used in this role. The ship has the largest capacitor of any Tech I combat frigate, and this makes it especially good at holding tackle against opponents with neutralizers. It can also field two light combat drones (and carry four).
The Tormentor is a good PvE ship for low-level missions, but the sturdier Punisher may be a better PvE frigate for novice Amarr pilots. The Punisher’s two mid slots, however, make it substantially more difficult to fit for tackle than the Tormentor.
In a beam Tormentor fit for scram kiting (scram, web, afterburner) the most common risk is that your opponent will get in a close orbit around your ship where your beams cannot track them. Ideally, you want to stay around your optimal range with Multifrequency ammo loaded.
In a pulse Tormentor, you need to decide whether to brawl in closer with Multifrequency or kite farther with Scorch. Which to choose depends on your opponent's ship and fit, you should try to maximize your damage while minimizing theirs. Keep in mind that even pulse lasers have worse tracking than blasters and autocannons, so there is still a risk opponents may orbit close to mitigate your damage.