CSS Flexbox ONLY, HTML

What did you find difficult while building the project?

Having only been programming for one month, I am still getting familiar with the languages ​​and their tools, therefore I did not use frameworks but rather did everything from scratch using only Flexbox as the only tool.

Which areas of your code are you unsure of?

I know I did a bad practice since in CSS, I changed the behavior of all the images instead of using a case.

Do you have any questions about best practices?

I would like to know what kind of order I have to follow for other coder to understand the best.