The best way to achieve simple automation?

Hi all, I often have a need to do the following sequence of edits:
- add a keyframe at playhead postition to the selected audio clip
- move playhead 3 frames to the right
- add a keyframe at the (new) playhead position
- set volume to 12
What would be the proper way to do that automatically (on a keyboard shortcut I define) in Resolve 20 free version?
- add a keyframe at playhead postition to the selected audio clip
- move playhead 3 frames to the right
- add a keyframe at the (new) playhead position
- set volume to 12
What would be the proper way to do that automatically (on a keyboard shortcut I define) in Resolve 20 free version?