Hello, CObirders!
I know there has already been much discussion about the end of the cobirds RBA, so I won't bog this post down with more of that. Instead, I hope to make it as easy as possible for this entire community of birders to use ebird's RBA email system. One last note before I get into it: something that has personally helped me is getting in contact with other local birders and joining "text RBA" that way. It's not comprehensive, of course, but just another fun way to interact with the birding community while finding great birds!
Step-by-step to set up HOURLY ebird email alert:
1) On your ebird homepage, click on the "Explore" tab in the upper-left side of the the screen:

2) Scroll down a little and click on the "Alerts" button found below the "Bar Charts" button:

3) Once in that menu, you can type in whatever region you would like to get reports for. Since this is CObirds, I've typed the state of Colorado as the region in the screenshot:

4) Once you click the green "Subscribe" button, you should be redirected to a page that looks something like this:

5) If you only want to subscribe to a daily RBA, then that is the default setting, and you're done! However, the daily RBA may lead to you missing reports that occur in the middle of the day and don't show up until the next morning. To prevent missing any birds, you can change the settings to receive hourly RBA. To do this, hit the change button with a little pencil and paper icon next to it:

That opens a pop up that looks like this:

You can change this to be daily or hourly. Click "Save" and you're done!
Hope this helps for anyone new to ebird! It's a great website, but sometimes their features aren't super easy to figure out.
The birds are happy, and so am I
~Caleb Alons, Larimer County