As my first project, I must say that I am very proud of my abilities, although I must admit that it was not perfect in its entirety. For example, one of my biggest failures was not putting the waves that went between sections because I was not able to put them. From then on, I didn't have any other problems. If there is something that the community saw that is of your displeasure, I will be more than willing to receive the necessary criticisms.
Good job, but remember put the attribute alt in images
How can I center my div box more easily? What can I change in my code?
body{ display: flex; flex-flow: column wrap; justify-content: center; align-items: center; min-height: 100vh; margin: 0; }
If you add to body this styles and later add a element with HTML every new element will go to the center of the screen.
And It's a good practice to have the styles in separate files, I recommend you create one .html file and one .css file and later link the .css using <link rel="stylesheet" href"path.css"> in .html file
