Your first practice task
Pick one task you or someone you know does by hand every week. Write a two-line problem statement: what goes in, what comes out, who uses it and how you will know the answer is right. Then mark which part needs a model and which parts are plain code. In practice, most students find the model is one step out of five.
We review that statement with you before any code is written, because a vague problem is the most common reason student projects never finish.