TL;DR: Stick to Python! It is absolutely fantastic for building LLM apps! Python is the gold standard due to its incredible library support. Methodically focusing on LangChain Framework for LLM Applications allows for rapid development. Avoid Mojo for now since it is too experimental. I highly recommend Packt Publishing Modern Generative AI with Python Paperback for your June goal. It is truly amazing!

To add to the point above: the suggestion to focus on Python for reliability is one I hear often, but honestly I have this exact same issue. I have been trying to map out a transition into AI development for about four months now and I am still completely stuck on which language to prioritize. It is incredibly frustrating because, like you, I have a very limited schedule and a career deadline approaching next summer, yet I still cannot find a definitive answer that feels safe. Over the years I have learned to be cautious with new tech, but the noise surrounding things like Mojo vs Python has me totally paralyzed. I have spent weeks researching without making any real progress on a study plan because the consensus seems to change every other day. I am in the exact same boat and still havent found a solution that works... it is just a nightmare trying to commit to one path when you dont have time to waste.