There are whole books written on the subject. Perhaps you could visit the local library to check one or two out and get the basics down by reading. That is how I started by reading. The needles, thread, battings, machine set up and everything should be covered in it so you feel confident enough to begin. If you like the book you could purchase it to reference later. Also, like the gals said U tube and craftsy are video teaching aids.
I started with pot holders being the practical person I am not wanting to waste anything.