Understand credits for spatial analysis
https://doc.arcgis.com/en/arcgis-online/analyze/credits-analysis-mv.htm

Esri Updated Demographics Variables 2023
https://www.arcgis.com/home/item.html?id=ddd1510ed1964e2e8fb1ded93e9b03b1

Enrich (Analysis)
https://pro.arcgis.com/en/pro-app/latest/tool-reference/analysis/enrich.htm