Tableau Source Mapping Tutor

I need a hands-on Tableau session focused specifically on replacing data sources from Snowflake to Athena—without breaking any existing worksheets, calculations, or dashboards. My sticking point is field mapping: identical-looking fields aren’t lining up, calculated fields turn red, and several filters drop out as soon as I swap sources.

Here’s what I’d like from our time together:

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• Diagnose a live example of my failing mapping, show me why certain dimensions or measures won’t link, and fix them on the spot.
• Share best practices for maintaining calculations and parameters during future migrations between Snowflake, Athena, or any other SQL-based stores.