I'm not really excited about it. I used to love football when I was a kid but nowadays is quite…meh, for me (I remember 98'WC when I was kid and it was so great :P). But I'll try to watch the matches of the teams I'm 'supporting' (Croatia and Russia).
I'm more worried about the 'foreigners' who are coming to watch the games here. Worst decision ever.

I wonder if the matches will even start due to protests in Brazil.

Don't worry about that! The ones who protest burning and breaking things through the cities (Black Bloc) are paid by the President's party to do so. There is a lot of money in the "game" and thus there will surely be WC.  ;D