A good thesis tells your reader exactly what you will argue and why it matters. Here is a simple way to build one.
Step 1: start with a question
Turn the assignment prompt into a question you can actually answer.
Step 2: take a position
Your answer is your claim. It has to be something a reasonable person could disagree with.
Step 3: add your reasons
Name the two or three main points that support the claim.
Step 4: test it
Is it specific, arguable and possible to prove in the length you have? If not, narrow it.
Example: “Remote work boosts productivity for knowledge workers when companies set clear goals, but it harms collaboration when they do not.”