Some links to check out if you want to explore Austrian economics from first principles:
Books, treatises and essays on the same topic which you can download for free:
https://mises.org/library/book/ultimate-foundation-economic-science
https://mises.org/mises-review/logic-action-murray-rothbard
https://mises.org/mises-wire/praxeology-and-mathematical-logic
https://mises.org/library/book/man-economy-and-state-power-and-market
https://mises.org/library/book/economic-science-and-austrian-method
https://mises.org/library/book/epistemological-problems-economics
https://mises.org/library/book/human-action
https://mises.org/mises-wire/intellectual-poverty-racial-polylogism
https://mises.org/library/book/theory-and-history-interpretation-social-and-economic-evolution