

I watched a video (can’t remember who or what it was called) that looked into the early days of radio. In the early 1900s it was a massive craze, especially among teenage boys, and quickly resulted in kids transmitting “obscene messages” and calling in fake commands and reports to naval radio operators. At the time there was no encryption or restriction on amateur radio use, and it lead to some embarrassing and dangerous moments for the navy.
The government finally acted in 1912 by forcing amateur radio to be restricted to the shortwave frequencies, decimating the hobby. This was partly driven by an incorrect rumor that these radio trolls had been responsible for, or interfered with the rescue of, the Titanic a few months earlier.
It was interesting to learn that trolls have always been with us, and also that the government could so decisively shape a new form of communication. If the 1980s giverments had banned use of the Internet by anyone outside the military and a small number of commercial or academic licence holders, things would be very different. Sure, the technology would be there and people would run amateur ip networks, or secretly piggyback of official uses, but it would be more like the dark net / tor than what actually happened.
You could try doing some searches for companies in your area that do the sort of work your interested. Most of them will have some public facing site for attracting customers or just for corporate image. Then you can normally find an email or social media details to get in touch and explain what you can offer.
And if the way you have to contact them is LinkedIn you might have to just suck it up. Almost no one who uses LinkedIn likes it. Like most things about employment, people just figure out how to give the right image for the industry they want to work in, and put on that professional front whenever they have to deal with the constant stream of bullshit. So if that means writing an upbeat “I think I could offer a lot of skills and passion to contribute to your organisation inspiring mission” type message to a 50yo self-centered ceo then, well, that’s how you get jobs sometimes.