How do I find a good General Contractor?

[Mitchell Litam]

So I am trying to find  a GC for upcoming potential BRRRs and not sure where to start.

I am house hacking right now and I just bought my partner out of the house and he moved out. With that being said I have a whole third floor that I want to renovate. Would it be a good idea to vet a new Gc by getting estimates on rehabbing the third floor with carpet and mainly renovating the bathroom? Is there a website I can have people bid on the work or what is the easiest ways you have found to find the best GCs?