click the "add" button to install it on your chrome browser. again, very easy.
then click the "puzzle piece" icon in the upper right corner of your chrome browser to reveal your installed extensions.
click on "metamask" and create a password, then copy your "seed phrase". keep the seed phrase in a very safe place. create multiple copies in a few safe places.
here's an article that explains ALL of that, including how to add ETH to your metamask wallet. it's even for coinbase users.
see the icon that looks like 2 pages? hit that, and it copies the long contract number to your computer's "clipboard". then you paste that into the custom token window on your metamask wallet.
FINALLY -- go to fegex.com and click "add wallet". it'll see your metamask wallet.