Best way to ship things back home?

Currently moving out of my apartment to a new place. Its much bigger but there are a few things that I wanna send back to my home country so I don't make a mess out of the new place.

-A bunch of unused clothes

-A mountain bike that I don't use anymore

-My old computer and monitor (My little brother wants it)

So mostly the computer and bike which I have no clue how to send them back since they're big and fragile. Maybe I can use my unused clothes to cushion out the PC and Monitor but if anyone has any suggestions on how to ship them back safetly and how expensive it'll be, please tell me.

by Juiseii