The problem you will have is

[Leif]

The problem you will have is that most fruit trees are grafted on to a root stock in order to restrict the growth. So yours will be the original tree and could be huge. Also, you might find the resulting tree is unlike the parent, as you don’t know the pollination partner. Why not buy a bare root plant from a reputable nursery? Bare root are said to be better than pot grown, presumably because the roots are not restricted. Mine came with plenty of root.