A still frame can look beautiful and still feel wrong in an edit. The preceding shot, a change in skin tone or a pause in the music can alter how it reads. I prefer to judge those choices on a timeline.
DaVinci Resolve combines editing, colour, Fusion compositing and Fairlight audio. Blackmagic Design explains the individual workspaces and editions.
Assemble the film first
I would establish the actions and rhythm before polishing individual shots. A beautiful image may still need shortening if it holds up the story. Generated shots need the same scrutiny as filmed footage.
In a product film, I also watch colour across locations. Different light can change a white object, but the edit should not suggest that the product has changed colour.
Locate the feedback
Give notes a shot and a timecode. “The second product close-up is too warm” is actionable. Review landscape and vertical cuts separately, then watch the exported files at their intended size.
Check the project requirements
The free and Studio editions have different capabilities. Before choosing an edition, I would test import, playback and export with a real sample from the project.