Get a soil test done. Go through your county agent. I'm in E. Tn. so our soil is probably quite a bit different. The most common problem for blueberries though, is soil pH. The county agent will provide the most accurate test and explain how to get a sample. You'll then have a basis for what amendments (if any) may help.

Aside from soil issues, one of the most common recommendations is to remove any flowers for, at least, the first 2 years. You can go out now and see if you have buds forming. That will let you know that they've survived the first year.