I hate it but it’s how these things go. You only had a 3 week internship at school because that’s what your school does at the end of your semester as a requirement for graduating? That’s fine, on your resume that becomes “Spring 2024”, people don’t need to know it was only 3 weeks, they can think it was 3 months unless they explicitly ask you how long it was which they usually don’t. It helped me land my first dev job years ago, it sucks but it works.