ha, good question... but the answer could be veryyyyyyyyyyyyyyyyyyyyy long....
In short, no, liking and upvoting are not the same. On facebook everything is "free" (hm) On steemit when you upvote someone, jou're giving away Steem (a cryptocurrency). So in fact, when upvoting you're giving money to someone.
But hold your horses… it's not that easy of course :-)
When you just start here you are limited in the number of votes you can give and in the so called "RC" RC is the bandwidht at is allocated to you. Every time you post something, or comment, or vote, you're using part of your bandwidh… In fact, I'm not even sure you have enough bandwidth left to answer my comment here :-)
Anyway, just check this free tool here: https://steemworld.org/@grandcommander It's a kind of dashboard for your account. The big number on the upper-left is your vote-weight and value…
In the middle you will also find your RC status. If you can't post or comment or vote, just check that number… it will probably be too low. Just wait a couple of hours until that value is high enough. (regenerating)
The longer you are here, the higher all those numbers will climb… and the higher your gain will be. At least, if enough members upvote your content :)
That's it for now… play a bit with what I explained you and don't hesitate to come back with other questions when all is a bit more clear!
PS: Good song my friend :-)