Killing Dragons RuneScape gold is probably the best money making method atm because pretty much anyone with decent stats can kill Dragons. On your case with your stats it is a piece of cake. So essentially your choices are: Green dragons - Situated in the Wilderness as I am sure you understand, it's easy to locate an empty world because quite a great deal of folks do not kill Greens from fear of getting PKed; Blue dragons - Extremely simple to kill, Taverley is usually crowded and so is your Heroes guild but it's not too difficult to find an empty universe. W117 Heroes guild is usually vacant.
And should you have level 60 Dungeoneering you can get Taverley source dungeon; Red dragons - Not really recommended because Red dragons can only be found in two places if I am not mistaken: Red dragon island in the Wilderness and Brimhaven dungeon and both are far from a bank; Black dragons - Taverley is crowded everywhere I would not even bother so Zanaris is your best alternative imo; Metal dragons - Not much to mention here, all metallic dragons are at the Brimhaven dungeon (Mithril dragons being the sole exception) and aren't too difficult to kill and have pretty decent drops; Frost dragons - 85 Dungeoneering required so it's not really an alternative for you right now if you don't really feel like training Dungeoneering. You can also attempt to make money with Slayer but if you don't get Dragon jobs all of the time I'm pretty sure you'll make more cash just killing Dragons.
What Silv said are pretty great hints. When I was your level I did . All the way from 60-70 plus it took me only like 3 days. It had been boring since you don't really get anything but experience there however. It is kind of weird since I don't recall what I've been doing 70-90. I am aware I've Chinned some tasks, umm and completed things like Ranging directors, the Circus. Not to mention Cannon.
In case you don't have a issue with wasting some money you could Cannon Dagannoths while you Range them too. Or you could Chin, however I don't imply Chinning til at least 80+. Going to Yaks can be good cheap OSRS gold exp/hr. Around 40k at the best now likely. But that could be pushing it a bit. As there are lots of robots.