The first things you did.

For f2p-

Your first combat skill- Attack

Your first non combat skill- First I can rememer was spinning Balls of wool for sheap shearer(crafting)

Your first memorisable achievement? Finding a bank! :D

Your first f2p quest? First I can remember was Fred's quest (sheap shearer)

For P2p (after f2p)-

Your first non combat members skill- Theiving

Your first memorisable members achievement? Made 30k canonballs from 15k coal and 7,5k iron, I bought a santa for the money I made and got 65 smithing.

Your first mingame- Treasure tralis if you count that as a minigame, otherwise I have no id̮̩̉̉a

Your first quest? - first I can remember is duids ritual