I'm a newby too and I'll tell you how I do. If the handle material is brittle and you won't gladly hammer it, make the holes a tad bigger than the pins and superglue the pin in place. After it dries cut the extra pin and file it flat with the handle.
If the handle is G10 or micarta or other though stuff, make the holes, countersink them, cut the pins a tad longer than needed and kindly hammer them until they fill the countersunk hole. You can glue them first too but it's optional.
This is just how I do them, maybe there are better ways.