Then it's about priorities, not ability. You don't want to do it, not that you can't. There was a family of 4 living in LA for a number of years. They produced nearly 100% of their daily intake and income from their 1/4 property with a house on it...

It is very possible.

I also helped a buddy start a farm to market operation on 3 acres. More than enough for his family, and enough to sell for profit.

We did a number of 100' rows and chicken tractors. He had meat birds and eggs. No shortage of calories, nutrients or protein.

He never stopped working his full time job. Maybe what you need is a hand in getting started.