Not sure you really need a new machine.
Do you have a Janome dealer near you? If so then take your machine to them and explain all your different issues with the machine. They should be able to (1) check your machine and (2) instruct you in how to do each of the functions, including FMQ.
They may even steer you to a class in FMQ. Or you can check with your LQS's for a FMQ class. I think a 'hands on' FMQ class would be best.
ali