Yes, I already tried that with my webcam (holding it to the eyepiece) and saw nothing

- don't know why. Maybe someone can explain why a webcam doesn't work afocal?
Follow the link for Mogg Adapters in the advertisements on the right of this page to find the 1.25" adapter you will need to connect your webcam, without its lens, into a focusser.
Are you prepared for lots of frustration while you learn?