1. Learn value of pieces - So chess players usually represent values with points, and here are them.
Queen - 9 points, Rook - 5 points, Bishop - 3 points, Knight - 3 points, Pawn - 1 point.
The more points you have, the more advantage you have. If you trade your rook (5 points) and capture your opponents knight(3 points), you will lose more points than him. So you should avoid situations where you lose more points.
2. Beware of traps - It's true that you should look out to have more points, but sometimes your opponent uses traps, where he tricks you into leaving your king unsafe, and checkmate him. So learn about traps and to defend against them. A common trap in your rating is the one named "Scholar's mate", so learn to defend against it.
3. Learn basic tactics and opening principles. Now there are many concepts, so I'll just give a link
https://www.chess.com/terms/chess-tactics
Now the advice I've given is keeping your rating in mind, so these don't necessarily apply when your rating increases.
I tuned in around move 24. On move 25 your opponent takes your rook's pawn and it looks like your king could be in a lot of danger.
The best move here is just simply to push your pawn on f3 one square. That was in the way of your rook and it means you can move your rook, which is on h3, over to d3 to check your opponent's king. Your Q is doing a good job where it is, stopping his king from escaping. You have a forced win here in about ten moves. That means that whatever your opponent does, provided you play the best moves you have a guaranteed win.
The best moves are hard to find and what you did, chopping off your opponent's bishop with your rook, isn't a bad move. The rook, however, is worth more than the bishop. Each piece is given a rough value in terms of the amount of pawns it's roughly worth. A queen is said to be worth nine pawns, a rook is five and a bishop or knight is about three each.
But what you did there is still a good move. At this point, I disagree with the engine as to what is white's best move but it certainly isn't what you played, which meant that your queen could be taken. The engine doesn't value the move I would make so high but it's the better move. You just jump onto e4 with your knight, checking your opponent's king. It's the beginning of a winning sequence of moves for white and black can't really defend, so you would win. Think of his king as a stray sheep which needs to be herded to a place where you can kill it. Poor sheep but they taste nice.