Never got into Starcraft. I used to play Age of Empires 2. Even watched some high-level tournaments. I was never a big fan of the emphasis on micromanagement in competitive RTS games, though (which is also why I never got into MOBAs). It seems to mostly be about who can click the fastest to exploit small glitches or gain small advantages.
AoE is a classic. Great game. It took me a little bit to get into Starcraft because of exactly the same reason! There is micromanagement but it does go alongside macro gameplay. It took me a while to really understand how to play the game. The learning curve for me was a beast. But I can say that Blizzard really has their ranking system worked out though! It didn't take many matches to get put in a reasonably competitive bracket when I started.