My first real own project outside of school was a drinking game written in Java. It had a ugly af GUI where you HAD to put in 5 names and 5 drinks because I didn't knew about storing objects in lists or arrays nor about checking for empty string when trying to access the string value that would be put in there by reading the empty input field. So I had 5 variables each for names and drinks. Then u would click on an button and it would randomly decide who had to drink which drink and how many sips between 1 to 5. Only played it ones at a party where I downloaded eclipse so that I could start my program because I knew shit about compiling into an executable file.