Need advice: Back end engineer → infrastructure: how do you make the transition?

Description

I’ve been a backend-heavy engineer for about 4 to 5 years, mostly in startups. For about 3 months I’ve been reading and building small things, but I’m not sure if I’m progressing or just spinning. I also don’t really have people around me in these areas, so I’ve mostly been trying to figure this out on my own, including using tools like GPT and Claude, but I still feel unclear. My work includes APIs, some real-time systems like WebRTC and streaming, and debugging production issues such as late