I have only grown strawberries once, and since the neighbor's dog persisted in digging them up every day while I was away at work, I gave up on them.
Blueberries I can talk about, however. They need an acidic soil, so it might be a good idea to have your soil tested. They need to be kept evenly moist, which can be a bit tricky growing them in a container. You need to be sure to have a fast-draining soil and plenty of drainage holes in the container.
They should be fertilized in early spring with a fertilizer that helps the soil to stay acidic. I use the same fertilizer that I use on my rhododendrons and azaleas, but that may not be aacceptable if you're concerned about growing organically. I'm sure other members will step in with alternative suggestions for you.
The leaves turn reddish and fall off in the fall. But new ones should sprout in the spring. The first 3 to 5 years, there will only be a handful of flowers and berries. After that, there should be berries in abundance, but you may have to use bird netting on the bushes, if you hope to have any berries for yourself. Birds love blueberries, and so do dogs, if you have any 4-footed buddies in your family.
Some varieties need a different cultivar to serve as a pollinator. Without that pollinator, your bushes will not be able to produce much, if any, fruit. There are varieties available that don't need a separate pollinator. The ones I have do not.
The final requirement, of course, is something to do
the pollinating. Observe your garden and see how many pollinating insects you see. Small flies, bees are essential. While many plants can be hand-pollinated, I think it would be difficult to do on a blueberry bush, because of the shape and size of the flowers. If you don't see plenty of pollinating insects at the bushes, you should think about planting flowers that specifically attract pollinating insects. There have been a few discussions here about what to plant for that purpose. You could use the search forum function to find them.
Last of all, remember that not every plant you plant is going to grow and thrive. Some just die, through no fault of your own. If you bought your blueberry bushes at a responsible garden store or nursery, they will probably give you a refund or replace the bushes for you. I don't know the policies of the big-box stores, as I only buy very inexpensive plants from them. If they die, I don't bother returning for a refund or replacement.
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" - Douglas Adams