This has slowed down as I've gained experience but basically I am always volunteering to work on stuff I only have a shaky understanding of or never have done before. If I'm not doing new things on a job for ~1 year or more I get extremely uncomfortable, or start learning on my own. People call it "resume building" but I usually work for small skeleton teams where there's a ton of work available for someone that just volunteers to do it. That was basically how I crawled into my terraform/IAC niche, I was on a team where that was needed, they weren't going to hire, and no one else volunteered to take it on.