How to increase rapid rating from 1400 to about 1700?

Hi, Can somebody look at my games and tell me where am i weak at?
How can i pass 1400? What should i learn? where can i learn intermediate chess for free? because i can't pay money because i'm an iranian and everything is filter here. anyway .... i have another question!
what shoud i do in the middle game after developing my pieces?

Firstly, use the game review feature to analyse your games after you play them to look for mistakes. At the 1400 level, the majority of your mistakes are likely to be tactical oversights, which you can stop by playing carefully and double checking before you play a move. In the middle game after developing your pieces, try to slowly improve your position by controlling the centre, taking space etc. while being careful to not make any mistakes that your opponent can take advantage of.

Thank you, i think this "Improve your position slowly" Will help me a lot.

The biggest reason people struggle in lower-level chess is because of blunders. They make them in almost every game.

A mistake can instantly put you in a bad position, no matter how well you played earlier: if you had great opening knowledge, great positional skills, great endgame skills, whatever; a single mistake can change everything (you lose a piece or get checkmated).

So, how do you avoid blunders? Follow this simple algorithm:

While avoiding blunders is crucial, I also share a few basic principles with my students. These principles help them figure out what to do in each part of the game - the opening, the middlegame, and the endgame. Understanding these simple principles is like having a map for your moves. I provide my students with more advanced algorithms that incorporate these fundamental principles. When you use this knowledge along with being careful about blunders, you're not just getting better at defending. You're also learning a well-rounded approach to chess. Keep in mind, chess is not just about not making mistakes; it's about making smart and planned moves to outsmart your opponent.