How should I study multiple programming languages as a beginner?

I'd make Python your main language for now. Use it to get comfortable with variables, data types, conditions, loops, functions, and checking inputs. Write little programs as you go instead of just reading about each topic.

Once you can use those basics without following a tutorial line by line, try applying the same ideas in C or Java. The concepts will carry over, even though the syntax and language features differ. There's no need to master Python before touching anything else.

Pick a small project you actually want to finish. A calculator is fine, but it could be anything that interests you and has a manageable first version.

Get one feature working, test it with different inputs, then add another. When you get stuck, look up the specific thing you need in the Python documentation. That gives the material a purpose instead of turning study into memorizing syntax.

You don't have to ban the other languages if you need them for something. Give Python most of your study time, and bring in another language when there's a specific reason to use it. Trying to make equal progress in all four at once can make it harder to build momentum.

If you prefer more structure, pick a beginner Python book and work through one topic at a time. Try the examples yourself, change them, and write a small exercise without looking at the answer.

An AI tool can help explain a confusing topic or show an example, but don't let it do all the coding for you. Check the result against the documentation and make sure you can explain what the code does.