Nobody plays the Scandinavian at the higher levels.
What does it matter what Grandmasters play? The OP won't be facing Grandmasters, nor will he play like one.
I've never understood this weird "You can't play X opening because Magnus Carlsen doesn't play it" idea. You aren't Magnis Carlsen. Your opponent isn't Caruana.
If you are looking for an opening with little theory required and only a few main continuations, why not the Scandinavian? 1. e4 d5
You end up in a formation similar to a Caro-Kann, but with fewer options for White.
Sure, you lose a tempo right in the opening after 1. e4 d5 2. exd5 Qxd5 3. Nc3 but that's also true of the Sicilian, since after 1. e4 c5 2. Nf3 d6 (or e6, or Nc6) 3. d4 cxd4 4. Nxd4 White's Pawn moved once and then disappeared, while Black's Pawn moved twice before disappearing... a clear loss of a move.