Do I get banned if I use it on own server, training mode?
No, i used to use OSHFusion on my own server, and, if you host it, there is no vac. Don't try to join a VAC server when it is loaded, even if it is off. My old account got banned for that, again using OSHFusion.
Hmmm, are you sure? It does say server is VAC protected when creating the training server.