You need to risk a minimum of 25k to receive drops though, I think that applies to low levels too but I'm not quite sure. I'd go with salmon too if I were you..can be fished quite easily and if you add up an extra 2 hp per food, you are gaining over 40 more hp than you would with trout.
i got some not bad stuff lots of runes and arrows on my first trip in edge so i went down to barb village...
dd in middle got owned back to training im ginna be staking a lil a duel arena to scrape up somore cash
i was using a few addy in bh didnt get too much loot still soem runes almost died a few times so im ginna go back to pvp after i auto 40 att and 50 str
try pking in varrock, more "legit" pkers, and other than that, if your mainly a ranger, you should carry a mith skimmy, no realy point to it. either way great start!