The free version of Resolve will do all you need to do.
I convert to Avid friendly media. Usually .mxf files, dnxhd of some type.
If you don’t want to use Resolve, than transcoding inside Avid would probably be the next best option. There is metadata that needs to be maintained during the transcode process, to enable you to go back to camera original files, if you so desire, for color, or finishing. R3d raw files offer a lot of flexibility when performing color correction operations, that basic rec 709 clips don’t offer.
You have the ability to go back to the original camera settings and adjust the exposure, and color balance, the same way the original camera operator would have.
If you want to look into Resolve’s workflow, I have posted some workflow videos on the topic.
Again, metadata is crucial, and in Resolve pay attention to the timecode and file naming settings, as shown below.
https://youtu.be/2flKWUgMJoI?si=8tyiKDmxvDNioO0h
https://youtu.be/201_Lh8SdIQ?si=jzoYS79YtMxjWMwa
Glenn