It's not what you think, it what other people think. You need to be playing for a club to learn proper fitness training and techniques and that is where the scouts will be watching. Also, it's not necessarily the stand-out player they look for, but one with potential, who's a team player and can read the game well.
A lot of young footballers have been several years at an academy by age 16, so you're behind the drag curve, but look at Sunday League as something fun. There are very few who actually sign a pro contract out of those who are taken on, and you would need a back-up plan anyway.