So right off the bat please note I’m not a cybersecurity expert, I’m just a web developer but I’ve been using Linux for 15+ years and do lots of DevOps-type stuff for fun in my free time.
You’re looking to escape web development ASAP but it would take some time to really learn cybersecurity right?
What I would do is take some courses on DevOps and really just jump in as quickly as you possibly can. My opinion is that DevOps will clear the way for you to build a foundation on which to study cybersecurity.
Please don’t take my opinion as life advice or anything though; I’m mainly just providing some input on how I’d frame the situation. Likely someone with more experience can either back me up or (rightly) respond I’m full of shit.