1. Installing metamask
You need to set up your MetaMask wallet by installing the MetaMask extension for your Chrome browser. Log in to https://metamask.io/, select the "Download" option and click on "Install MetaMask for Chrome".
You will be directed to the Chrome web store where you will have to click on "Add to Chrome". A pop-up will appear will the "Add extension" button; click on that. After that, MetaMask will be installed in the Chrome browser.
For detailed usage after installation, please refer to the Youtube video below or the contents organized by others.
When installing MetaMask, the most important thing is to save the "Secret Backup Phrase" well. If someone else knows about it, they can hack the stored POC and cryptocurrency at any time. Never take pictures with online notepads and emails, or mobile phones and upload them to the cloud. If possible, go for the handwritten version on a paper-like notepad and avoid exposing it to others.
Even if the Metamask installed in the Chrome browser is accidentally deleted, you can always restore the created Metamask account as long as there is a "Secret Backup Phrase".