Learn the basics of blockchains and Ethereum (miners and validators, gas, cryptocurrencies and NFTs, block explorer, networks, etc.):

https://metamask.zendesk.com/hc/en-us/articles/360015489611-Learn-the-basics-of-blockchains-and-Ethereum-miners-and-validators-gas-cryptocurrencies-and-NFTs-block-explorer-networks-etc-

Getting Started with Meta Mask and How to Install on a Browser or Mobile App:

https://metamask.zendesk.com/hc/en-us/articles/360015489531-Getting-started-with-MetaMask

How to use the Meta Mask Mobile Browser:

https://metamask.zendesk.com/hc/en-us/articles/6356387482523-How-to-use-the-MetaMask-Mobile-Browser

Token Safety Practices:

https://metamask.zendesk.com/hc/en-us/articles/4403988839451-Token-safety-practices

What is a ‘Secret Recovery Phrase’ and how to keep your wallet secure:

https://metamask.zendesk.com/hc/en-us/articles/360060826432-What-is-a-Secret-Recovery-Phrase-and-how-to-keep-your-crypto-wallet-secure

What is an Air Drop and how to tell the difference between a regular airdrop and airdrop phishing scams:

https://metamask.zendesk.com/hc/en-us/articles/9008198129691-How-to-tell-the-difference-between-a-regular-airdrop-and-airdrop-phishing-scams

Common Scams and how to avoid them:

https://metamask.zendesk.com/hc/en-us/articles/4412217080091-Common-scams-and-how-to-avoid-them#:~:text=Sweepers,a%20compromised%20wallet.%C2%A0

Meta Mask Support Page:

https://metamask.zendesk.com/hc/en-us

What is a Hardware Wallet and why should I have one?

https://metamask.zendesk.com/hc/en-us/articles/4408552261275-Hardware-Wallet-Hub

Metamask video tutorial:

https://www.youtube.com/watch?v=-HTubEJ61zU