Manual Buttonhole Help

I am full of questions today!!  I have an old, old Singer without a cool buttonhole feature.  Can anyone provide a good manual buttonhole tutorial?  Thank you so much!!

This is pretty much how I do it even though I do have a buttonhole gadget.

http://thru-hiker.com/projects/manual_buttonhole.php

Practice on some scraps from your project before you do it for real. Prep the scraps the same way, number of layers, interfacing etc. as the spot on the garment where the buttonholes will go.

I agree practice with the same fabric that you are using. Its not hard once you understand how your machine will do. I used to do manual ones before my computerized machine.