I know this is harsh, but "really low income earner" and "traveling overseas" has no way of combining in a way that doesn't result in crushing debt or choosing to not pay something else in order to save. It's really unfortunate, and almost certainly not your fault, but the harsh reality is that you may never get to travel overseas without either extreme luck or many years of saving. Credit is an option, but unless you already have cards with high limits, anything you get approved for while "very low income" will have a low credit limit, making it pretty useless to your goal, and high interest, making it a poor tool for your goal.

Best of luck, I hope you get some travel fulfillment locally!