To the OP: there is a book "Starting Out with 1.e4" by McDonald. I suggest that may give you a good start.
Changing opening Repertoire
@ViktorHNielsen are you implying that the Ruy Lopez cannot be played for an advantage at 2800 level? If you are correct, then the entire opening 1. e4 probably doesn't work.
And no, don't play the Smith-Morra at 1100 level. Wait until 1500. In the Smith-Morra, you have to be able to handle the positions of the accepted variation, the d3 Maroczy bind variation, the 3...d5 line which often leads to an endgame where white is much better in spite of being a pawn down, the Alapin transposition, and more. That's entirely too much for a Class E-D player.
I believe I mentioned that about the Morra in my post.
About the 2800, it was a little joke, but anyway, it is difficult to get advantage with the ruy lopez. Even Magnus Carlsen just tried to get positions where he was able to play chess in the World Chess Championsship. Obviously, the variation did set some problems, but with good play for black, it was nothing. However, that is not what practical chess is about. It's about setting problems for your opponent, and not for the theoriticians.
Well I gave the pawn, and black gave me oportunity to put the rook on the half open f file where my rook is going to watch the f7. Black also gave away all of the initiative, and space.
So if both sides give something I think it's called - trade.