The following are resources that have been created by the wider community. We always recommend using the official documentation (which you're current reading), however if you need more examples and guidance, the following may be helpful.
The following links do not mean endorsement.
Delpherum base class Aave implementation for Delphi devs
Flash Loan brownie mix for Python devs
Generalised Aave Flash Loans by Kendrick Tan
Flash Loan tutorial by EatTheBlocks
Basic overview of Flash Loans by Kames
Flash Loan tutorial in Portuguese by DeFi Brasil
Depositing and borrowing in Italian by Deabit
Flash Loan tutorial by StudyDeFi / Kendrick Tan