onion seed planting

so I kept all the good onions that I grew over the summer,
and have been storing them,
I waited till about half of them went bad for one reason or another,

so I have now selected out for:
the good growing ones,
the ones that make 2 bulbs (I kind of want large bunching onions),
and the ones that store well

I will know what seeds happen in many months from now,

now I have to wait till fall to plant the seeds,
and make onion "sets" out of them for spring planting,
so it will be a year and 6 months till I know what I have got at all,
likely the next generation past that before I have a good idea of what I have,
I have my tiny bunching onions to hold me over till then.