heilander4:
So do you think that, would lead to the boost converter to stop working with a smaller load?
If the resistor is smaller that is a larger load, not a smaller one.
You can't make a boost converter on solderless bread board, it is folly to try. It might work with small currents but anything substantial simply will not work. You require a properly designed PCB.
I have managed many specialist engineers, and have yet to meet one who can design a working switch mode power supply in less than three iterations of PCB. The problems are keeping it stable over the range of all possible current draws. Your project is doomed to failure. Especially as you don't seem to even have an oscilloscope.