Moved the site to Grav cms, need advice and comments

Need some advice. What could be improved? What did I do wrong? I am a beginner, and alas I can work well with my hands. I will be grateful for any advice, criticism and guidance. Alas in the country in which I live is not all good, but I plan to earn money for a new site design.
I will need a calculator to calculate the cost of furniture, I have the terms of reference for this module, it remains to find out how much money to save?
My site meizer . kz