Improve score in PSI

Hi there, First of all, I apologize for not knowing in what type I should raise the problem. I have no knowledge about this platform. I am a website designer and I work with WordPress and Elementor. So thank you for your complete guidance.
We have a website at
We want the page speed insight errors to be fixed. And that the robots.txt file is also added to it.
If there is someone who can do this for me for a fee, please let me know.