I think before someone even should start to do your Tips, I'd recommend checking volume! Especially on the FSW servers 90% of moneymakers are bad because nobody is buying stuff, but everybody tryies to sell. Going through moneymaking methods and buying/selling one step further/below can be much more profitable. I always check volume and price before grinding those GC. Example: If everybody crafts jewellery you might be better off selling gold bars, or buying the jewellery and high alch it.
Crafting jewelry is honestly amazing for F2P. Mining my own gold, smelting it into bars, and then making my own jewelery. It's how I madd my first million gold 🥹🥲
people will hate me for this but begging in GE at world 301 is the best if you are lucky you can get a bond straight up i got enough gp to buy a bond begging for 1 day