By reading
The bible you may learn anything you want!
Otherwise, just ask and maybe I'll be able to tell you from my own experience.
If you wanna learn how to make Bonk songs, that's easy.
Step 1 : Download
GCFScapeStep 2 : Run GCFScape
Step 3 : Use it to navigate to your Steam folder, Steamapps and find "Team Fortress 2 content" file, Open it!
Step 4 : Sound > vo > Scout_specialcompleted 02/03 are boink and bonk
Step 5 : Extract them to Program files > Image-Line > FL Studio > Data > Patches > (Create Folder) > (Place in Folder)
Step 6 : Launch FL studio
Step 7 : Create Sampler channel
Step 8 : If it's not already visible hit F8 to open the Browser, then find the folder you made for your boink/bonk sounds.
Step 9 : Drag and drop the sound into the Sampler channel.
Step 10 : Create a highly annoying song and video for YouTube.