Sure, here are some links regarding how to create a self sustaining garden for 1 person indefinitely:

According to https://www.thespruce.com/how-many-vegetables-per-person-in-garden-1403355, you generally get more yield in a small space if you garden in wide rows. In “How To Grow More Vegetables”, intensive gardening guru, John Jeavons, says you’ll need about 200 sq.ft. per person to grow enough vegetables and soft fruits for the growing season at intermediate yields.
https://morningchores.com/self-sufficient-gardening/ has an vegetable garden size calculator including for more than one person 
https://www.gardenbetty.com/how-much-to-plant-in-a-vegetable-garden-to-feed-a-family/ includes a table chart that shows how much to plant for a year’s worth of food.
Furthe information on self sustainable garden can be found at https://ireallylikefood.com/guide-to-a-self-sustaining-garden/
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