what is the best way to throw a breakaway? i feel like im not getting the full spin time out of my yoyos when i throw breakaways
It’s just practice really, when I first started learning the breakaway my hand felt really out of place but practice is the key to perfect. It’s like when you first throw a sleeper; you don’t seem to be able to throw is with force without making it comfortable so just practice and you’ll get the feel of it. 
Practice throwing the yoyo as straight as possible by keeping your arm straight
It helped me back in the day
the problem didn’t turn out to be the breakaway. it was just me being sloppy. now that im a bit more careful i feel a lot better about my spin times