You’ll learn very little (or nothing at all). The problem is that people are exploring too many options too soon. The new Twitter account looks really cool for the first time, but there’s also Pinterest, Facebook, YouTube, Google+, LinkedIn, Reddit, Tumblr, WordPress, Blogger, Flickr, and the list goes on and on.
If you took the time to learn about every social network, you won’t be able to absorb all of that knowledge. Even if you did absorb all of that knowledge, there isn’t enough time in a day to manage all of those social networks.
There are some cool ways to manage social networks using automation, but that will only get you so far. It’s better to narrow your knowledge and time on 1-3 social network than to overstretch your knowledge and time on 4 or more social networks (however, I want to be clear that there is no magic number. You could end up doing just fine with more than 3 social networks if you adopt them all a couple of months apart. I use more than 3 social networks).