Here are are two well done examples of what others have done and might save you work or provide inspiration:
Ultimate Adaptability: Variant Humans for 5th Edition by Rich Howard (Tribality.com). Provides examples for humans by both environment (e.g., arctic, desert) and culture (e.g., mageocracy, martial)
Alternate Humans-Environmental Variants by AeronDrake, a poster at Reddit.com/r/Unearthed Arcana (The link is to homebrewery.naturalcrit.com). This was chosen to by the reddit Unearthed Arcana moderators to be hosted among the best of 5th edition homebrews.
Ultimate Adaptability: Variant Humans for 5th Edition by Rich Howard (Tribality.com). Provides examples for humans by both environment (e.g., arctic, desert) and culture (e.g., mageocracy, martial)
Alternate Humans-Environmental Variants by AeronDrake, a poster at Reddit.com/r/Unearthed Arcana (The link is to homebrewery.naturalcrit.com). This was chosen to by the reddit Unearthed Arcana moderators to be hosted among the best of 5th edition homebrews.
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