If your newsgroup software allows for SOCKS5 proxy, then use localhost:9150. You must keep Tor Browser open at all times to provide connection to the Tor network.
If your software does not allow the use of a SOCKS5 proxy then it is not compatible and you may want to switch to another tool like Thunderbird which does allow it.
You will find very few services for specifically hosting Tor services at all and I don't think you'll find any with a preinstalled Laravel configuration. Your best bet us to:
Get a Linux VPS
Set up tor to provide a service on port 80 (or another port if your prefer)
Install Laravel on the VPS and compile your site using the port from step #2.
I'm not very ...
As far as it goes it sound good.
Make sure that you follow the projects recommendations for browser settings. There are also various add-ons that can both increase anonymity and make the browser more useful.
If you install any other software, make sure that you have done a search on the "make and model" to verify that it has not been hacked. To be ...