As my personal opinion bacteria culture is totally unnecessary. Yes you can use but you dont need. Just put some small amount of fish food to your tank and wait for 1 wees or so... Other good way to turn your bacterias on, just use another tanks filter and filter media in your filter. Not really big process to generate that good bacterias... By the way I like your hardscape. just dont use tall plants. HC Cuba will be great.
Good luck with new baby