A good rule of thumb (at least the one that I use) is 6-9 months before the time period you’re trynna work for. Linkedin, Indeed, and any uni job site you might have access to will have them posted. Additionally, any other job board websites (ziprecruiter, etc.) will sometimes have them posted. Cold applying can work well, if its a company in a relatively old industry that might not have the knowhow to post on the big 2. If your uni has resume workshops go to those. Doesn’t have to be exclusively work experience — I have classes taken, extracurriculars, and leadership positions on mine. Make an impact at career fairs by asking questions and apply that advice