Develop your tactical eye first...
How to win at Chess? Forget the openings but learn Tactics first to be able to see combinations. Learn Tactics and you are on a winning road. The road is hard and stony but you have to walk on it.
The point is that when you can't see any combinations that win material then you are not able to win a pawn or a piece which will give you a winning advantage.
When you have any material advantage you should exchange pieces and simplify to go into the endgame where you can win with less risk as there are not many pieces on the board.
Furthermore your material advantage will be more effective in the endgame. The more pieces you trade off, the more your opponent will feel your material dominance.
For example, let's say you are a bishop up in material. If you trade off pieces and pawns now you will finally reach a position like this: You have a king and a bishop and a few pawns. Your opponent has a king and a few pawns. He has no pieces like bishop or knight so your bishop or king will eventually kill all his pawns, then you promote one of your pawns into a queen and win easily.
These exercises might drain your brain a bit and you might even think that you got a bird brain, but this is just an illusion. Finally your studies will lead you to success in chess. Put your thinking hat on and give it a go. Don't look at the solutions right away, but make an effort to see a good move.
The color at the bottom of the board has to move first. So if the black pieces are at the bottom of the chess board below, then Black has to move first.