Not sure you're into podcasts, but I recommend Manager Tools Podcasts, which is like a 15-year gold mine of free training. https://www.manager-tools.com/all-podcasts

Outside of searching the keywords "interview" and "hiring" and looking for what seems relevant, I'd recommend specifically the 4 "Management Trinity" episodes and "Juggling Koan".

source: 5-year manager at a public SaaS company in the Midwest, recently discovered the podcast.