When I was about 14 I got in touch with Photoshop and "designed" some themes for Woltlab Burning Board 2 (if someone of you even knows this) in my sparetime. After the designing I also wanted to write the templates and CSS for it. I adopted some other CMS and did the same there but my dream was always to become a web designer. So I did an internship and realized that I can't force myself to be creative 8 hours per day.
I did another internship in the same company as developer. I knew HTML and CSS quite okay but PHP came on top. My first project there was a guestbook with an administration panel. Simple CRUD things with self written BB code parser (str_replace ROCKED 🤘!!!), fancy gif smileys, pagination and SQLi + XSS prevention (I exaggerate a bit 😛).
I'm curious what your first project was!