Here's the tutorial to get you started: https://autohotkey.com/docs/Tutorial.htm
Or search Youtube for tutorials if you are more of a hands on type 
i made this script but its not working
if i press my fn key it mutes when i should have to press fn and pause to make it mute
SC163&Pause:: Volume_Mute
SC163&Insert:: Media_Play_Pause
SC163&Home:: Media_Stop
SC163&PgUp:: Volume_Up
SC163&Delete:: Media_Prev
SC163&End:: Media_Next
SC163&PgDn:: Volume_Down
Try this:
SC163 & Pause:: Volume_Mute
SC163 & Insert:: Media_Play_Pause
SC163 & Home:: Media_Stop
SC163 & PgUp:: Volume_Up
SC163 & Delete:: Media_Prev
SC163 & End:: Media_Next
SC163 & PgDn:: Volume_Down
I was wondering if your FN key would be a problem but I guess it is registering so that's a good sign.
Edit - I just found a script to remap Caps Lock in to a layout switcher 
no i get a error with that script to where it wont run the script
update never mind i fixed it !
SC163 & Pause::SendInput {Volume_Mute}
SC163 & Insert::SendInput {Media_Play_Pause}
SC163 & Home::SendInput {Media_Stop}
SC163 & PgUp::SendInput {Volume_Up}
SC163 & Delete::SendInput {Media_Prev}
SC163 & End::SendInput {Media_Next}
SC163 & PgDn::SendInput {Volume_Down}