A practical low-effort workflow is to start from your camera’s own JPEG look, then batch-apply that as a default to your RAW files.

First, check the TZ101 settings: make sure JPEG quality is set high and reset any accidental picture-style changes such as oversaturation. Choosing a neutral or natural photo style can give you a better baseline.

Then use RAW software that can apply camera-style defaults or a saved preset automatically during import or batch export. Panasonic/Silkypix can apply at least some camera settings to RAWs, and Lightroom can apply base photo styles as default edits. Batch tools in other editors can also help if they support presets/macros.

Keep in mind there is no fully automatic conversion that will always make perfect choices for every image. RAW contains more dynamic range than JPEG, so any JPEG output requires tradeoffs in highlights, shadows, and contrast. Camera scene modes and software presets can automate some of this, but mixed lighting often still needs occasional manual correction.

So the best “fewest steps” approach is: reset camera JPEG settings, choose a mild style, create a default RAW preset that matches it, then batch export and only fine-tune the exceptions.