1. Hi, nice to meet you!
2. Personally I would recommend a True Blaberus craniifer or some type of hisser. I personally am a fan of big roaches, as it's super cool to watch them and be able to hold them if you desire. A true Blaberus craniifer has black wings and a prontum with a skull-shaped marking. For some reason they are often confused with other Blaberus sp. Hissers are also cool, but always try to go non-hybrid, as they are much better and worth the effort.
3. The best book is "For the love of cockroaches". It's super helpful.
I hope I could help!