Thread painting can be fun. A good quality thread can create wonders. Thread painting bsics are simple,. Imgine your needle in the machine is a pencil and draw as you would draw on a paper.
Metallic thread is a tough cookie and specially a cheep quality. But recently I have been trying all sorts of threads and not getting fooled by the drama my Bernina machine creates in accepting them. I tried to fool the machine by making cheep thread feel good by mounting it up or dropping it down to give it the extra weight age or pull it needs. It works:)
Taking a pencil sketching course can help a lot in thread painting.