This is a good place to start. He explains how to force people to complete a profile before anything else.
Spend some time searching this whole forum - there are TONS of great ideas to work from, but they don’t normally come pre-written for you, it’s gonna take some work on your part, definitely more than 12 minutes of trying. Patience and persistence will give you the results you want. This “teach a man to fish” approach will reduce your dependence on others to make that next step in your app.
Best of luck.