Read section 1.2 (p. 4-7) of this textbook, which will give you some tips for how to spot an argument. While the premise indicators and conclusion indicators are not guarantees of an argument, they can assist you to identify an argument.
Complete Exercise 2, at the end, distinguishing arguments from non-arguments and identifying the conclusion of argument sentences. Despite the name, the conclusion often precedes the premises when we present arguments in ordinary language. When you finish the exercise, check your answers against the answer key on p. 207.
The entire text book can be found here: Introduction to Logic and Critical Thinking