Just invent something. There are problems out there, so research one. Try this, try that and make it work. Keep improving it. Don’t quit or give up. Remember Thomas Edison had many many attempts at the light bulb, getting the right wire and right voltage at the right temperature. So keep trying and don’t give up. When up again a wall pray and seek guidance from above. Sometimes working on multiple areas at once can help give the inventors mind a break, so you can get the next break through.