Read and work with the book My System written by Nimzowitsch. Yes, there are many mechanics in chess. Opening a file, creating a strong square, placing a light piece on the strong square, opening and invading on the a-file, binding a knight to a queen with a bishop, blocking a passed pawn with a knight, using the bishop pair to create holes in the opponent pawn structure, performing a mating attack with a queen+knight, building a bishop and queen battery, weakening the enemy pawn structure with a sacrifice, using the seventh rank with the heavy pieces, building maximum pressure on a square, etc.

Maximum distance between knight and any piece. Distance between king and passed pawns. Distance between knight and passed pawns (has to be calculated because the knight can give a check to gain time). Recognize opposite colored bishop endgames that can still be won (by blocking the opponent bishop diagonal or preventing the bishop from taking a diagonal using your king). Taking the seventh rank with your rook. Stopping enemy passed pawns with your rook. Blocking enemy passed pawns with a knight. Learn all endgame wins by heart (K+Q vs K, K+R vs K, K+Q vs K+R, K+B+B vs K, K+B+N vs K). Learn to use the R+N team to attack the enemy king. Also, I would advice to read and work with the book My System written by Nimzowitsch. It has a collection of ideas and goals that can guide you during the entire game.