My time came & went with kids 30 years ago – grandkids are now quite proficient in elite boxing and elite rugby.
If the youngest grandkids want to play football then they can play with their mates in local leagues; 20 minutes max to an away game, afternoon in Cleggy for fish & chips and amusements with team mates.
If they were any good then the big boys would still want them.
Also, if you start at the bottom, there’s nowhere to “fall” to.
By this, I mean if you are good enough for a Man Utd, a Newcastle, a Liverpool – there are plenty of other branches (clubs) to hit on the way down.
Start at a Grimsby, a Donny or a Morecambe etc and you hit the ground when released.