You can use MakeMKV to rip Blu-rays, that’s the easiest way I know. You’ll need a Blu-ray drive of course. Resolve won’t support MKV, so you can use Handbrake to make MP4s or something, that’s what I did for Resolve. Or find another program to rip straight to a supported format. Good luck. (this thread is probably better suited for How-To’s and Technical Discussions btw)

Edit: ChainsawAsh’s method is vastly superior. I think Resolve doesn’t support AVI files though, so keep that in mind. I’d definitely recommend demuxing the audio into separate tracks either way because Resolve isn’t great with importing multi-channel audio in some cases.