I’m telling you facts regardless of whatever your plans are, you have to expect this to be done and if you can’t legally do most of the things on your own there’s going to be road blocks here and there. I’m also trying to tell you that anything with Call of Duty quality gameplay and mechanics is at least 2-4 years or more for an indie team and it’s very unrealistic. You should as a developer start with smaller more manageable goals that could even start with mobile or PC alone.