There are a lot of existing threads on focus stacking specifically and macro photography in general that you could check out:
https://forum.inaturalist.org/t/focus-stacking-with-olympus-tough-tg-5/1973
https://forum.inaturalist.org/t/aligning-images-for-focus-stacking/58089
https://forum.inaturalist.org/t/tips-for-macro-photography/54356
https://forum.inaturalist.org/t/secrets-to-good-macro-photography/24026
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