My Blueberrie Bushes are now a year old.
Very healthy plants I got from JParkers last year

With new growth? If you have this, you are over the first big set of
hurdles (related to soil pH and maybe mycorhiza).

so far they have not given me any fruit.

I don't know if I'd expect flowers the first spring (I guess ours,
which are small plants, had a few, but we picked them off to let the
plant spend its energy on getting established). But next spring I
would think so.

Do they get full sun? Although in the wild blueberries are forest
understory plants, full sun is recommended in the garden.

I want them to be organic plants .

Some organic ways of lowering the soil pH or keeping it down are pine
bark, pine needles, or oak leaves.