What is the best way you have found to make gil trying to earn some quick gil and have a lack of knowledge on what sells well..
Doubt you will get much love for this kind of question here. Best to stick to technical questions about how to use the bot and the addons/profiles many have kindly contributed.
Like others have said, look at your market board. There may or may not be easy money in level 50 1-4star gathering mats and soils. Pre-xpac stuff, otherwise farm whatever profiles you can get working. Eventually you will find yourself a routine and switch up what you are farming and selling to prevent over saturation of the market.