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
Oh, I am not at all convinced about the Bacter 100 at all but more than a few people swear by it so I am giving it a shot. Many believe that more benificial bacteria helps with algae which is going to be one of my tests.
I am using mostly Glosso for the foreground as I have done HC many times but if I don't like it, I will likely switch to HC or Belem. I actually wanted to do belem but I can never find it when I am starting a new tank.