Plenty of good suggestions in this thread. I’ll add on that I recommend you read Alyssa Miller’s “Cybersecurity Career Guide”. It will answer many of your questions and provide you a roadmap to land your first job. https://www.manning.com/books/cybersecurity-career-guide?ar=true&lpse=A
Very much agree. I’d love if Valve would consider filling this niche considering the great success of the Steam Deck. A small clam-shell handheld sized like the GBA SP or the DS.