Very worried about staying professionally relevant for the next 20 years and earning money to support my family. All along my career so far, I've played it safe

Very worried about staying professionally relevant for the next 20 years and earning money to support my family. All along my career so far, I've played it safe to choose paths that I deemed were conventional. Looking back, it feels I didn't choose IT/software even though I was interested in it. In the everything is moving to a software world, I want to retrain asap.