Any tips for getting the first industry SWE internship?

I’ve had an undergraduate research summer CS internship but I’ve been applying to hundreds of industry SWE internships and haven’t had much luck. Because of that, I’ve been developing personal projects and doing leetcode (neetcode roadmap)

I’ve had a few friends get internships just by networking at big career fairs. Is it possible to network the same way through a cold email/linkedin message? I’ve tried it before but I’ve been ghosted and I just feel in-genuine. So what are your best tips that many people don’t think about for landing that first industry internship? I’ve been applying literally everywhere. My resume is similar to Jake’s resume and I’ve tweaked it countless times for my projects and experience (that one research internship lol).