Manuals are available for download off of the manufacturers websites which can be found with a simple internet search.
The Flybarless system you have is compatible with
- Built-in Futaba S-FHSS 2.4GHz support for Futaba S-FHSS transmitter
You mention not being able to afford a better radio and I get that. I also understand that a helicopter is an advanced RC aircraft and even good pilots will crash them often... which will result in having to by parts to replace it often. I hope you have already learned to fly before you bought it... if not, consider saving up for a good RC flight simulator for a PC like Realflight to learn on before you try learning on your own. It will more than pay for itself in fewer crashes. You will still crash from time to time, but if you trained first it should be less often.
A better for a beginner aircraft is an airplane... even these will take practice which a flight simulator is still recommended. I am not trying to discourage you but to give you realistic expectations so you aren't discouraged and just quit the hobby all together.