Similar to offensive ammunition. Though it's an individual preference , arrows that are cheap like Iron or Mithril can make you save RS gold a lot of cash in the long term since their prices are low. You don't require anything fancy apart from a great weapon, and plenty of food items like Crabs as well as Monkfishes. Keep your protection prayers at the ready in case your level of prayer allows it. Don't be fooled by free-to-play gamers because they are real beasts fighting on behalf of their interests. P2P is always ahead but it is not impossible to lose.
If you want to level accounts through questing methods Then completing Waterfall quest gives by far the most valuable bonus exp that will take your skills very quick to high levels. Make sure to think thoroughly about your strategy and each choice. You're just a human and it is possible to make a mistake but it is pretty easy to be successful in PvP when you're well-prepared.
Quests are the missions assigned by non player people (NPC) in the game. They usually require traveling to specific locations, doing various tasks cheap OSRS gold and sometimes defeating a antagonist in the story.