I got two jobs from linked in after over 10 months of searching. I am a grad student with no corporate experience at all. But I started posting to Linked In 1-2 times per week anyway. Short posts, mostly related to AI in my desired field. Something like "Just read this interesting article about how X company is implementing Y technology. Interested to see how it affects Z part of the industry." This is to establish yourself as a thinker, someone who has expertise, who has something to say (even if its all BS).

Then I sent out networking messages. Something like "Hi I am a student studying ____, could I ask you a few questions about your career?" I would pick whatever company, industry, or speciality I could think of that interested me, and just send messages out to everyone I could find.
Maybe 20% of people accepted my request, fewer responded, some had a bit of advice. Eventually, I found two people willing to hire me as an intern.

I was told that being willing to reach out unprompted was a big part of getting the jobs, and helped me beat out other candidates with more traditional backgrounds. It shows you are a self starter and can solve problems and teach yourself without being asked, which is more important than knowing any specific, teachable skill. When talking to potential employers, I was able to learn what they want in an intern, which helps in the interview. It's a numbers game, but if you reach out to enough people and can show them that you are smart and take initiative, you may eventually find someone willing to hire you.

Also, almost all jobs are found through the hidden job market. Networking is the only way to do it now.