I hate to rain on you, but I think you're setting yourself up for disappointment. Your plant will want full sun, outdoors in the moving fresh air. It's likely you'll need to use some tricks to help your soil drain properly until the plant gets well-established, and I think just the vinegar, in the right proportions was all you needed for the acidification.

Do be careful to avoid nitrate sources of N. Use a fertilizer that gets its N from urea - like Miracle-Gro.

There are a LOT of threads that address blueberries in containers here, & a search will bring them up. Use the search words 'blueberries nitrate' and you'll get threads with more technical info.

Al