Image Source: @PlayOverwatch
Next weekend, Overwatch is having a free weekend, allowing everyone to play Overwatch for free.
The free weekend will start 11:00 am PT, May 25.
All information, FAQ, and Scheduling can be found here: http://playoverwatch.com/en-us/blog/21779230?blzcmp=app
The pre-download phase for PS4 and Xbox has started. For instruction downloads, follow the steps listed here: http://playoverwatch.com/en-us/blog/21779230?blzcmp=app#play
Note: To play the game on Xbox One, you must have an Xbox Gold membership.
To download the game early on PC, follow the first two steps from the link above, then follow this link and scroll down to Overwatch: https://us.battle.net/account/download/
(It's the same thing, just one extra step)
To learn about each hero and their playstyle/abilities/skills, watch my video on YouTube here (I would use DTube, but I haven't figured it out yet):