How do I find tenants for a house hack?

[Cameron Woodward]

Im in the process of buying my first property. A 4 bedroom house but there's an extra room we can use as a bedroom. As of right now me, my partner , and one other person is moving in but, I need to find a way to fill in the other 2 bedrooms. Is there any recommendations on sights or places I can find good quality tenants. Another question, What's the best way to screen and run a background check on them?