Hi Neishy,
There is an updated course coming in the not too distance future, but Omar’s link should sort you out.
You are right – proxies have been depreciated, so it’s all ‘Library Overrides’ now.
It’s almost the same to set it up except after linking in the master collection (ALL CAPS) then you create an override by searching (F3) and type “Override”. You will see the option called “Library Override- Make”
(They keep changing this slightly with every release but it should be the first option)
