If you are going to get some fruit trees, you’re best advised to get the dwarf varieties.
Most non-dwarf fruit trees just grow too tall for private gardens.
You can get dwarf oranges, lemons, mandarins (and most citrus), dwarf peaches, nectarines, apples, pears, mulberries, mangoes, figs, persimmons, avocadoes etc.
These miniature fruit trees still produce fruit that is the same size as those on the large trees and the fruit is also of the same named varieties too. You can get dwarf navel oranges or dwarf Eureka lemons etc. etc.
Your local nursery or hardware store should stock dwarf fruit trees or you can buy them online from daleysfruit.com.au. daleysfruit.com.au