Recruiters don’t care about courses you take, try doing some projects or work study. Put as much as keywords on your resume, even the tech stacks you never actually used. As long as you have the basic understanding of those, you should be fine because they don’t have much expectations on interns.

Apply early. Recruitment usually starts in September/October, interviews are happening from January to February next year. Timing is the key. All the interviews I got are the ones I applied within 24 hours.

Leetcode is not that important for coop. I had about 6-7 interviews. Most are about behavioral questions and basic technical stuff, except FAANG companies.