@foursquare #1
Here's some hints :
* Improve on your openings in correspondence chess. In those games you will be able to use an opening book, and have enough time to look up statistics and possibilities, in order to make a choice for the move that you want to play.
Playing slower time control chess games can also help your chess.
Looking at your ratings you are only playing blitz so far.
Play some classical chess as well!
* Your blitz rating is 1700+ which is quite good.
You are already beyond the U1600 blitz level which basically has a high chance to drop pieces and blunder in almost every game.
Furthermore, in general beginning chess players are "forced" to play 1.e4 e5 and 1.d4 d5 with black. The reason for 1.e4 e5 is probably to learn to not hang your pieces in open play tactics. However, other openings have their advantages.
For example, playing the French defense has a big advantage for beginning chess player : It is unlikely to run into any quick Fool's or Legal checkmate with black in the opening (though in the French one needs to be careful about some Greek gift wins for white in some lines).
But even playing style does not really need certain openings.
For example, GM Levon Aronian is an attacking player, but likes to play 1.c4 with white.
Did you try other openings against 1.e4 with black ?
French, Caro-Kann, Sicilian, Modern defense, Pirc, Scandinavian, Alekhine, Nimzovich ... there is a lot of choice.
In blitz it can also be handy to have a few "surprise" off-beat openings line ready to play by you.
* What do you consider your playing style ?
Attacking/tactical or positional/technique based, or all-round ?
Based on your results and your playing style and checking whether you feel comfortable in certain positions/endgames/opening lines, can be the foundation of the choice of your opening.
For example : Gruenfeld Indian will have the need for thorough opening preparation as there are many lines and ideas.
But overall it is basically like this in some of the lines :
White gets a broad center which black can attack.
If white manages to keep the center this can results in a passed d or e pawn. Black however has in some lines a pawn majority on the queenside. This can be a big ace in the endgame (because kings usually go for castling short, making the kings reside far away from the queenside, and some passed pawns run really fast).
Another example :
Both in Scandinavian and Caro-Kann certain positions can occur where black can play on the queenside creating a weak c3 or b2 pawn for black. White can play in the center and kingside. If black manages to stop the center/kingside attack, then black can win the endgame or win in a counter attack.
If you like to attack right away from the start, and still want to play 1.e4 e5 with black, you can look into the somewhat unsound Elephant gambit, Latvian gambit, and also the Traxler gambit, and the Jaenisch/Schliemann line of the Ruy Lopez.
If you don't mind cramped positions and like to defend and counter-attack, for example the Philidor defense, and the Lion are good options.
HTH, good luck, have fun !