Welcome, Frodo. I've never sewn on a "Brother Singer" myself, but have had many operator errors. There are many on this forum who can help you.
You can probably locate a copy of a manual for the machine online if you have the model number. Or maybe someone on the forum can provide a source for the manual or provide a copy for you. The manual will answer your questions on threading and the bobbin winding.
For basic quilting, there are many, many you tube video's to guide you. If you have a quilting guild near you, visit them and ask if someone will help you learn. Some quilt shops provide lessons but you will pay for them.
Good luck to you. And remember, at one time we were all in the "operator problems" stage!