When I was younger I wanted to move in to management type roles. However I have never had (or made?) the opportunity so I feel like these are outside of my short to medium term goals. Moving to a company that offers advancement would be an ideal, but in the meantime I feel like I need to make myself a compelling candidate.

I totally understand around difference between pm/dev work though - in a perfect world I want dev work, however I am willing to accept it's not a possibility for me at my age whilst maintaining my current income.

I don't have a technical network for job opportunities (due to non technical teams) and job ads/recruiters seem to filter on technical proficiency.

Another commenter said I should double down on basics and meet end user needs - that's precisely what I do. I get things done, but can I demonstrate technical knowledge or professional experience with language x? Can I define what a singleton is? I'm not so sure.