Ask HN: How to Transition from Software Engineer to AI/ML Engineer

Background: I am a Software Engineer and over the years got opportunity to work on different areas (Frontend, Backend, etc). For past 1 year I had started developing Co-pilots using Langchain, OpenAI, RAG. Now my query is if I want to build expertise in this areas what courses/books I should read so as to build knowledge around this area? I am looking for suggestions.