While you should always talk with your instructor and listen carefully to any instructions, I think what you are referring to as an "inquiry project" is basically an argumentative research essay which starts with a question. The best way to create an effective inquiry is to:
1. Choose a question that really interests you.
2. Research to find out the different views people have on that question.
3. Get accurate statistics and data that explain the current situation and any proposed solutions or ideas that have already been tried to solve the problem (explain the cause, define the situation, etc.).
4. Organize and write your essay using my guidelines: https://owlcation.com/academia/How-to-Write-an-Arg...