I think most frames are loaded in a very similar fashion. Typically you have 3 rollers.
You load the backing onto the takeup roller and the roller closest to the takeup bar. You may need to roll the backing fabric back and forth between these rollers to get it rolled evenly. It helps if you have ensured your backing fabric is squared before loading.
You then position the batting on top of the backing and use the machine to sew a straight line across the top, securing the batting to the backing. A channel lock helps a *lot* to get a straight line here. I use a very large binder clip on the carriage to create a channel lock for my machine. Most quilters leave the bottom of the batting hanging free (a "float").
You have the choice of floating the top (similar to what you do with the batting) or securing the bottom of the top to the roller closest to your body. I have tried floating, but prefer securing the top. If securing, roll the top evenly onto the roller, then sew a straight line across the top of the top to secure it to the batting/backing.
Youtube has videos that show how to load a quilt on different frames. Watching a few of those should help get you started. There are a few variations for specific frames, but the general idea is the same for all.