Step 1. Go to the Metamask website.
Step 2. Click “Get Chrome Extension” to install Metamask.
Step 3. Click “Add to Chrome” in the upper right.
Step 4. Click “Add Extension” to complete the installation.
Here is a YouTube instruction on how to set up metamask wallet – MetaMask Tutorial for Beginners - How to Set Up MetaMask
or you can read how to set up metamask wallet with the link — https://www.geeksforgeeks.org/how-to-install-and-use-metamask-on-google-chrome/