Jan provided us with an excellent handout with a good range of designs to try and information on threads and needles. She recommended that you use the manufacturer's leaflets that are available for types of threads and needles and what they are recommended for. And of course try and see what works best for you. And then, you know, Practice. Below I am sharing the references she did for us. Should help you on your own journey, and the info is not proprietary.
So now it's just about practicing... and practicing... and practicing...