Trying to study openings in detail is way to early at your stage. There is no point in spending a lot of time to come out of the opening with a small edge, when you blunder away the advantage within a few moves after leaving the book.
It is correct that you first have to focus on learning all critical tatical motives. There is a lot of free tactic training material here on chess.com.
First you have to complete your basic tactic training and you have to be sure not to blunder pawns and pieces resp. you don´t miss chances to win pawns and pieces blundered by your opponent. You should also be able to find simple mate threats in one or two moves.
You should also learn basic endings. E.g. how to mate with a queen, two rooks, one rook, two bishops. Also simple pawn endgames are important. E.g. how to promote a pawn in a K+p versus K endgame and how to keep your opponent from doing so.
Start with playing open systems 1.e4 e5 or at least semi-open if your opponent does not go for 1.. e5
Italian game or Ruy Lopez is good to start with. But don´t spend time on learning many variations.
Learning opening move sequences by heart without understandig the basic stratetic concepts behind them is useless. You will soon forget the move order and make yourself crazy.
Learning chess is quite a complex task with many different fields of knowledge you have to work on. Intense study of opening theory makes only sense at an advanced stage (e.g. > 1800 FIDE-rating).
Okay so I know in the opening you want to develop pieces, control the center, castle, and connect your rooks. Most people say to do all this in 10 moves if your opponents moves allow so. My questions are 1) when do you start to learn specific systems ( such as the main lines of ______ fill in the blank) 2) People say its useless for beginners as I to worry about openings and focus on tactics, but there has to be some openings and defenses that are better to learn and more successful than others. I guess I'm a little confused on what to do other than those main moves and transition my game to the middle game. A lot of the times I feel like I make mistakes in the beginning even though I try to follow those main rules and it seems like maybe I'm just not using the right openings. Any suggestions on openings being the basics would be appreciated.