How to get Metamask:
go to https://metamask.io/
select download and choose your platform accordingly.
Once downloaded, open Metamask (either via browser extension on desktop or mobile app on mobile).
You will be prompted to create a new wallet, create a password and save your recovery phrase. (BE SURE TO WRITE THIS DOWN OR SAVE IT SOMEWHERE SECURE. WITH IT ANYONE CAN GAIN ACCESS TO YOUR WALLET AND STEAL YOUR FUNDS!)
Once completed, you will be taken to the main screen of the Metamask wallet.