Hi i'm a new player to runescape and I wanted to know what the best skill to raise is and how to raise it if i want to make money. By the way i'm f2p.

from my experience, mining is a good way to go. get to 15, hoard about 1k iron ores and sell them 100ea on world 1. then get a rune pick, continue mining until you get to lv 60, then start coal

id say sticking just to one skill is boring as hell, just train all skills generally to say 20 then do the one you liked best... e.g. crafting or mage (slayer p2p my fave :P )

like justj2 said, dont simply focus on one skill, unless you have the patience of a man watching paint dry. smithing is a grat skill to gte up, as f2p can make just as much money as p2p from it, but it is very slow, and expensive to raise.

 

you could also try out fishing (and in turn, cooking) as they are fairly easy to raise, compliment each other and also can make you money

Get your mining and smithing up by getting cooper and tin ore, smelting them then making armour and weapons. Then you can sell the stuff you make at shops, for example make a bronze longsword, sell it at the swordshop in varrock.